Partner: Jack 17 November Determination of the Molar Mass of Volatile Liquids

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Partner: Jack 17 November 2011. Determination of the Molar Mass of Volatile Liquids"

Transcription

1 Partner: Jack 17 November 2011 Determination of the Molar Mass of Volatile Liquids Purpose: The purpose of this experiment is to determine the molar mass of three volatile liquids. The liquid is vaporized in a Beral-type pipet with capillary head then rapidly cool to condense the vapor. The mass of the condensed vapor is determined then used in a form of ideal gas equation to find the molar mass of each volatile liquid. The significance of this lab is that forensic scientist could use the molar mass of the volatile liquid together with the empirical formula of a compound to determine the molecular formula of that compound. Hypothesis: The hypothesis is that the molar mass of the volatile liquid can be found by vaporizing the volatile liquid in a Beral-type pipet. The mass of the condensed vapor can be used in a form of the ideal gas equation to find the molar mass of the volatile liquid. The temperature of the pipet was heated so it was high, so the molecules behave like an ideal gas because they have a lot of energy to overcome intermolecular forces. Materials: Materials Trial 1 Trial 2 Ethyl Alcohol (Ethanol) (C 2 H 5 OH) 9 ml 9 ml Acetone (CH 3 COCH 3 ) 9 ml 9 ml Isopropyl Alcohol ((CH 3 ) 2 CHOH) 9 ml 9 ml Distilled water 2 L Tap water 1.2 L 15-mL Beral-type pipets 18 pipets 4-decimals electric balance 1 balance Hot plate with magnetic stirrer 2 plates Magnetic bar 3 bars 250-mL beaker 2 beakers 150-mL beaker 3 beakers 600-mL beaker 5 beakers Ring stand 3 ring stands Thermometer 3 thermometers Scissors 1 pair Paper towel 3 blocks Permanent marker 4 markers Plastic tubing pipet holder 4 tubing pipet holders Universal clamp 3 clamps Boiling stones 90 ml 10-mL graduated cylinder 2 cylinders 25-mL graduated cylinder 2 cylinders Buret clamp 3 clamps Procedures:

2 1.) Add about 30 ml of boiling stones to the 600-mL beaker 2.) Add about 500 ml of distilled water to the beaker 3.) Put it on a hot plate with magnetic stirrer 4.) Start heating the water using heat level of 9 5.) Pull the thin part of the Beral-type pipet 6.) Keep pulling until it stretch, creating a capillary tube where it s pulled 7.) Try to leave as much thin part as possible 8.) Cut the capillary part of the pipet, leaving it about 1 cm long on the side of the bulb head 9.) Repeat step 5.) to 8.) for two more pipets 10.) Label the pipets as 1, 2, and 3 11.) Mass each pipet 12.) Using the graduated cylinder, measure 3 ml of ethyl alcohol 13.) Transfer the alcohol to pipet number 1 14.) Repeat step 12.) and 13.) for pipet number 2 and 3 15.) Insert the tube part of all three pipets through a plastic tubing pipet holder 16.) Clamp the plastic tubing 17.) Put the bulb part of the pipet in the heated water 18.) Put the thermometer in the beaker in a way that the thermometer does not touch the side of the beaker 19.) Add about 500 ml of tap water to another 600-mL beaker 20.) Wait until all the volatile liquid (ethyl alcohol) had vaporized 21.) As soon as all the liquid had vaporized, check the temperature 22.) Transfer the pipets to the tap water beaker 23.) Check the temperature of the tap water 24.) After a minute, take the pipets out of the water 25.) Gently dry each pipet with paper towel 26.) Mass each pipet 27.) Rinse the inside of each pipet with distilled water 28.) Fill the pipets completely with water 29.) Mass each water-filled pipet 30.) Squeeze all the water from inside the pipet to a 25-mL graduated cylinder 31.) Record the volume of water 32.) Repeat step 30.) and 31.) for the other two pipets 33.) Repeat step 5.) to 32.) using acetone 34.) Repeat step 5.) to 32.) using isopropyl alcohol 35.) Repeat step 1.) to 34.) for one more trial Results: The longer the thin tube part of the Beral-type pipet was left, the easier it is to get them through the plastic tubing pipet holder because the bulb part of the pipet would not be pushed against each other. The boiling stones caused the water to blur from the stone dust. After heating the pipet for a while, the top of the hot plate turn yellow. The brown color of the permanent marker turned to blue after it was heated along with the pipets in the water bath. Some of the permanent ink was washed

3 away with heated water. The ink is easy to be washed with the volatile liquid. All the volatile liquid feels cold when touched and exposed to air. Some liquid take longer to vaporize than the other. Determination of Molar Mass of Ethanol (Ethyl Alcohol) Trial 1 Temperature of boiling water bath (K) Mass of empty pipet (g) Mass of pipet and water (g) Mass of water in filled pipet (g) Volume of pipet (ml) Ethyl Alcohol Trial 1 Trial 2 Trial 3 ethyl alcohol (g) Mass of condensed ethyl alcohol (g) Molar mass of ethyl alcohol Average molar mass of ethyl alcohol Determination of Molar Mass of Ethanol (Ethyl Alcohol) Trial 2 Temperature of boiling water bath (K) Mass of empty pipet (g) Mass of water in filled pipet (g) Volume of pipet (ml) Ethyl Alcohol Trial 1 Trial 2 Trial 3 ethyl alcohol (g) Mass of condensed ethyl alcohol (g) Molar mass of ethyl alcohol Average molar mass of ethyl alcohol Determination of Molar Mass of Acetone Trial 1

4 Temperature of boiling water bath (K) Mass of empty pipet (g) Mass of pipet and water (g) Mass of water in filled pipet (g) Volume of pipet (ml) Acetone Trial 1 Trial 2 Trial acetone(g) Mass of condensed acetone(g) Molar mass of acetone Average molar mass of acetone Determination of Molar Mass of Acetone Trial 2 Temperature of boiling water bath (K) Mass of empty pipet (g) Mass of water in filled pipet (g) Volume of pipet (ml) Acetone Trial 1 Trial 2 Trial acetone(g) Mass of condensed acetone(g) Molar mass of acetone Average molar mass of acetone Determination of Molar Mass of Isopropyl Alcohol Trial 1 Temperature of boiling water bath (K) Mass of empty pipet (g) Mass of pipet and water (g)

5 Mass of water in filled pipet (g) Volume of pipet (ml) Isopropyl Alcohol Trial 1 Trial 2 Trial 3 isopropyl alcohol(g) Mass of condensed isopropyl alcohol(g) Molar mass of isopropyl alcohol Molar mass of isopropyl alcohol Determination of Molar Mass of Isopropyl Alcohol Trial 2 Temperature of boiling water bath (K) Mass of empty pipet (g) Mass of water in filled pipet (g) Volume of pipet (ml) Isopropyl Alcohol Trial 1 Trial 2 Trial 3 isopropyl alcohol(g) Mass of condensed isopropyl alcohol(g) Molar mass of isopropyl alcohol Molar mass of isopropyl alcohol Volatile Liquid Average Molar Mass of Trial 1 Molar Mass Table Average Molar Mass of Trial 2 Average Molar Mass of Both Trials Literature Molar Mass of the Volatile Liquids (Wikipedia) Percent Errors (%) Ethyl Alcohol Acetone Isopropyl Alcohol Analysis:

6 Mass of water in filled pipet = (Mass of water and pipet) (Mass of pipet) Mass of water in filled pipet equals mass of water and pipet minus the mass of pipet Trial 1 (Ethanol Pipet 1): = g Trial 1 (Ethanol Pipet 2): = g Trial 1 (Ethanol Pipet 3): = g Trial 1 (Acetone Pipet 1): = g Trial 1 (Acetone Pipet 2): = g Trial 1 (Acetone Pipet 3): = g Trial 1 (Isopropyl alcohol Pipet 1): = g Trial 1 (Isopropyl alcohol Pipet 2): = g Trial 1 (Isopropyl alcohol Pipet 3): = g Volume of the pipet = (Mass of water in filled pipet) (Density of water at room temperature) Volume of the pipet equals mass of the water in filled pipet divide by density of water at room temperature Trial 1 (Ethanol Pipet 1): = ml ethanol Trial 1 (Ethanol Pipet 2): = ml ethanol Trial 1 (Ethanol Pipet 3): = ml ethanol Trial 1 (Acetone Pipet 1): = ml acetone Trial 1 (Acetone Pipet 2): = ml acetone Trial 1 (Acetone Pipet 3): = ml acetone Trial 1 (Isopropyl alcohol Pipet 1): = ml isopropyl alcohol Trial 1 (Isopropyl alcohol Pipet 2): = ml isopropyl alcohol Trial 1 (Isopropyl alcohol Pipet 3): = ml isopropyl alcohol Mass of condensed ethyl alcohol = ( ethyl alcohol) (Mass of pipet) Mass of condensed ethanol equals mass of pipet and condensed ethanol minus mass of the pipet Trial 1 (Pipet 1): = g

7 Trial 1 (Pipet 2): = g Trial 1 (Pipet 3): = g Trial 2 (Pipet 1): = g Trial 2 (Pipet 2): = g Trial 2 (Pipet 3): = g Mass of condensed acetone = ( acetone) (Mass of pipet) Mass of condensed acetone equals mass of pipet and condensed acetone minus the mass of the pipet Trial 1 (Pipet 1): = g Trial 1 (Pipet 2): = g Trial 1 (Pipet 3): = g Trial 2 (Pipet 1): = g Trial 2 (Pipet 2): = g Trial 2 (Pipet 3): = g Mass of condensed isopropyl alcohol = ( isopropyl alcohol) (Mass of pipet) Mass of condensed isopropyl alcohol equals mass of pipet and condensed isopropyl alcohol minus mass of pipet Trial 1 (Pipet 1): = g Trial 1 (Pipet 2): = g Trial 1 (Pipet 3): = g Trial 2 (Pipet 1): = g Trial 2 (Pipet 2): = g Trial 2 (Pipet 3): = g Molar mass of ethanol = [(Mass of condensed ethanol) (Gas constant) (Temperature of the boiling water bath)] [(Barometric pressure) (Volume of the pipet)] Molar mass of ethanol equals product of mass of condensed ethanol, gas constant, and temperature of boiling water bath divide by the product of barometric pressure and volume of the pipet

8 Trail 1 (Pipet 1): ( ) [( ) ] = g/mol ethanol Trial 1 (Pipet 2): ( ) [( ) ] = g/mol ethanol Trial 1 (Pipet 3): ( ) [( ) ] = g/mol ethanol Trial 2 (Pipet 1): ( ) ( ) = g/mol ethanol Trial 2 (Pipet 2): ( ) ( ) = g/mol ethanol Trial 2 (Pipet 3): ( ) ( ) = g/mol ethanol Molar mass of acetone = [(Mass of condensed acetone) (Gas constant) (Temperature of the boiling water bath)] [(Barometric pressure) (Volume of the pipet)] Molar mass of acetone equals product of mass of condensed acetone, gas constant, and temperature of boiling water bath divide by the product of barometric pressure and volume of the pipet Trail 1 (Pipet 1): ( ) [( ) ] = g/mol acetone Trial 1 (Pipet 2): ( ) [( ) ] = g/mol acetone Trial 1 (Pipet 3): ( ) [( ) ] = g/mol acetone Trial 2 (Pipet 1): ( ) ( ) = g/mol acetone Trial 2 (Pipet 2): ( ) ( ) = g/mol acetone Trial 2 (Pipet 3): ( ) ( ) = g/mol acetone Molar mass of isopropyl alcohol = [(Mass of condensed isopropyl alcohol) (Gas constant) (Temperature of the boiling water bath)] [(Barometric pressure) (Volume of the pipet)] Molar mass of isopropyl alcohol equals product of mass of condensed isopropyl alcohol, gas constant, and temperature of boiling water bath divide by the product of barometric pressure and volume of the pipet Trial 1 (Pipet 1): ( ) [( ) ] = g/mol isopropyl alcohol Trial 1 (Pipet 2): ( ) [( ) ] = g/mol isopropyl alcohol Trial 1 (Pipet 3): ( ) [( ) ] = g/mol isopropyl alcohol Trial 2 (Pipet 1): ( ) ( ) = g/mol isopropyl alcohol Trial 2 (Pipet 2): ( ) ( ) = g/mol isopropyl alcohol

9 Trial 2 (Pipet 3): ( ) ( ) = g/mol isopropyl alcohol Average molar mass of ethyl alcohol = Σ(Molar mass of ethyl alcohol) 3 Average molar mass of ethyl alcohol equals the sum of molar mass of ethyl alcohol divide by 3 Trial 1: ( ) 3 = g/mol ethanol Trial 2: ( ) 3 = g/mol ethanol Average molar mass of acetone = Σ(Molar mass of acetone) 3 Average molar mass of acetone equals the sum of molar mass of acetone divide by 3 Trial 1: ( ) 3 = g/mol acetone Trial 2: ( ) 3 = g/mol acetone Average molar mass of isopropyl alcohol = Σ(Molar mass of isopropyl alcohol) 3 Average molar mass of isopropyl alcohol equals the sum of molar mass of isopropyl alcohol divide by 3 Trial 1: ( ) 3 = g/mol isopropyl alcohol Trial 2: ( ) 3 = g/mol isopropyl alcohol Average molar mass of both trial = [(Average molar mass of trial 1) + (Average molar mass of trial 2)] 2 Average molar mass of both trial equals the sum of average molar mass of trial 1 and trial 2 then divide by 2 Ethanol: ( ) 2 = g/mol Acetone: ( ) 2 = g/mol Isopropyl Alcohol: ( ) 2 = g/mol Percent Error = (Average molar mass of both trial) (Literature molar mass of the volatile liquids) 1 Percent error equals the absolute value of the average molar mass of both trial divide by the literature molar mass of the volatile liquids minus 1 Ethanol: ( ) 1 = % Acetone: ( ) 1 = % Isopropyl Alcohol: ( ) 1 = % The hypothesis was not confirmed true. This is because the molar mass of each volatile liquid calculated from the experiment and the literature molar mass is significantly different from each other. Volatile

10 liquids with lower boiling point often give better results than those with higher boiling point. This is because the volatile liquid would get more energy than it needed to vaporize. Thus, it is quite certain that all liquid was vaporized. So when the vapor condenses, the mass inside the pipet would be accurate since there s no liquid left in the pipet that would be added to the mass of the condensed vapor. If vapor condenses in the neck of the 15-mL Beral-type pipet, the mass of the condensed vapor would be greater. Thus, the mass that should have been of the vapor that was in the ratio of its molar volume would be increase because there was some mass that did not evaporate. This could cause a considerably big error because the mass of the gas for a certain volume is much lower than the mass of a liquid for a certain volume because the density of a liquid is greater than gas. Thus, the mass of little amount of liquid could affect the mass of volume significantly. If the liquids have enough attraction to form dimers, the molar mass would increase. This is because the molecules combined from two to one so the volume to that was previously taken by each molecule will be decrease in half. Thus, the molar mass would be doubled since each molecule now has twice the mass of before. Conclusion: The hypothesis cannot be verified from the results acquired from the experiment. The hypothesis did not work possibly because not all liquid was vaporized because the water bath absorbed a lot of heat so the heat might have been too low to vaporize all the liquid. If not all the liquid was vaporized, the molar mass would be greater than it should have been. Also, some errors could have happened during the experiment. The pipets might have been moved to the room temperature water bath too slowly because there were some hindrance such as the Buret clamp above the universal clamp which was clamping on to the pipets. This might have caused the air that was pushed out to get back inside and increase the mass of the vapor. If the mass increased, the molar mass that would also increased because the molar mass uses the mass in the calculation. Another error that could have happened was that the vapor might have condensed at the neck of the pipet. The neck of the pipet was cut so that it was long in order to put it through the plastic tube pipet holder. However, the longer the neck also meant that it was further away from the heat of the boiling water bath. Thus, there is a higher chance that the vapor condensed at the neck of the pipet. If the vapor condensed at the neck of the pipet, the mass would be greater because instead of getting the mass of the volatile vapor, the mass found would have been of the volatile vapor and the volatile liquid. Since the total volume was the same whether it is purely vapor or vapor plus liquid, the mass of the vapor plus liquid would be greater because the liquid is denser than gas. The increase in mass would also results in the increase in molar mass. Some ways to prevent the errors in the future experiment would be to make sure there would be nothing to obstruct the transfer of pipet from the boiling water bath to the room temperature water bath. For example, the Buret clamp holding the thermometer could be put on other ring stand so that the universal clamp holding the pipets could slide up and down the stand with no hindrance. Another way to prevent the future errors would be to cut the neck of the pipet just the right amount so that it would not be too long that it was too far from the water to allow the volatile vapor to condense. The neck should be measured and cut so that all three pipets could easily slip through the plastic tube and ended right above the tube

11

Determination of Molar Mass by Vapor Density

Determination of Molar Mass by Vapor Density Determination of Molar Mass by Vapor Density One of the properties that helps characterize a substance is its molar mass. If the substance in question is a volatile liquid, a common method to determine

More information

Experiment 10B DETERMINING THE MOLAR MASS OF A GAS

Experiment 10B DETERMINING THE MOLAR MASS OF A GAS Experiment 10B DETERMINING THE MOLAR MASS OF A GAS FV 3-31-16 MATERIALS: Dry 250 ml Erlenmeyer flask, piece of foil (~3 x 3 ), 800 ml beaker, 500 ml graduated cylinder, iron ring, ring stand, wire gauze,

More information

Physical Properties of a Pure Substance, Water

Physical Properties of a Pure Substance, Water Physical Properties of a Pure Substance, Water The chemical and physical properties of a substance characterize it as a unique substance, and the determination of these properties can often allow one to

More information

The Energy of Evaporation A Lab Investigation

The Energy of Evaporation A Lab Investigation The Energy of Evaporation A Lab Investigation Summary In this investigation, students test evaporation rates for different liquids. Next, students use a thermometer to measure the temperature change during

More information

EXPERIMENT 15: Ideal Gas Law: Molecular Weight of a Vapor

EXPERIMENT 15: Ideal Gas Law: Molecular Weight of a Vapor EXPERIMENT 15: Ideal Gas Law: Molecular Weight of a Vapor Purpose: In this experiment you will use the ideal gas law to calculate the molecular weight of a volatile liquid compound by measuring the mass,

More information

Experiment 12E LIQUID-VAPOR EQUILIBRIUM OF WATER 1

Experiment 12E LIQUID-VAPOR EQUILIBRIUM OF WATER 1 Experiment 12E LIQUID-VAPOR EQUILIBRIUM OF WATER 1 FV 6/26/13 MATERIALS: PURPOSE: 1000 ml tall-form beaker, 10 ml graduated cylinder, -10 to 110 o C thermometer, thermometer clamp, plastic pipet, long

More information

Evaluation copy. Fractional Distillation. computer OBJECTIVES MATERIALS

Evaluation copy. Fractional Distillation. computer OBJECTIVES MATERIALS Fractional Distillation Computer 8 An example of a simple distillation is the separation of a solution of salt and into two separate pure substances. When the salt solution is heated to boiling, vapor

More information

In this experiment, we will use three properties to identify a liquid substance: solubility, density and boiling point..

In this experiment, we will use three properties to identify a liquid substance: solubility, density and boiling point.. Identification of a Substance by Physical Properties 2009 by David A. Katz. All rights reserved. Permission for academic use provided the original copyright is included Every substance has a unique set

More information

MOLECULAR WEIGHT DETERMINATION OF AN ORGANIC LIQUID

MOLECULAR WEIGHT DETERMINATION OF AN ORGANIC LIQUID 1 MOLECULAR WEIGHT DETERMINATION OF AN ORGANIC LIQUID I. OBJECTIVES In this experiment the molecular weight of a volatile, unknown organic liquid will be determined. From this information and quantitative

More information

Determination of the Molecular Weight of a Volatile Liquid

Determination of the Molecular Weight of a Volatile Liquid CHEM 121L General Chemistry Laboratory Revision 1.2 Determination of the Molecular Weight of a Volatile Liquid Learn about the Gas Laws. Learn about the Dumas Method of Molecular Weight determinations.

More information

Laboratory 14. Vapor Pressure and the Heat of Vaporization. Objectives. Introduction

Laboratory 14. Vapor Pressure and the Heat of Vaporization. Objectives. Introduction Laboratory 14 Vapor Pressure and the Heat of Vaporization Objectives Use experimental techniques to record temperature and volume data for known and unknown compounds in which the liquid and gas are in

More information

Determination of Molecular Mass by Freezing Point Depression

Determination of Molecular Mass by Freezing Point Depression Determination of Molecular Mass by Freezing Point Depression Objectives: To determine the molecular mass of an unknown solid using the colligative property of freezing point depression. Background: When

More information

Distillation Experiment

Distillation Experiment Distillation Experiment CHM226 Background The distillation process is a very important technique used to separate compounds based on their boiling points. A substance will boil only when the vapor pressure

More information

Water Lab. Objective: To distill samples of water that contains volatile and nonvolatile components.

Water Lab. Objective: To distill samples of water that contains volatile and nonvolatile components. Water Lab I. Distillation Hypothesis: Water can be purified by distillation. Objective: To distill samples of water that contains volatile and nonvolatile components. Materials and Equipment: Sodium chloride,

More information

Calorimetry: Heat of Vaporization

Calorimetry: Heat of Vaporization Calorimetry: Heat of Vaporization OBJECTIVES INTRODUCTION - Learn what is meant by the heat of vaporization of a liquid or solid. - Discuss the connection between heat of vaporization and intermolecular

More information

The Molar Mass of a Gas

The Molar Mass of a Gas The Molar Mass of a Gas Goals The purpose of this experiment is to determine the number of grams per mole of a gas by measuring the pressure, volume, temperature, and mass of a sample. Terms to Know Molar

More information

Experiment 2 Microscale Density and Refractometry

Experiment 2 Microscale Density and Refractometry Experiment 2 Microscale Density and Refractometry OUTCOMES After completing this experiment, the student should be able to: make a micropycnometer from a Pasteur pipet. calculate the density of a liquid

More information

MOLECULAR WEIGHT BY BOILING POINT ELEVATION

MOLECULAR WEIGHT BY BOILING POINT ELEVATION MOLECULAR WEIGHT BY BOILING POINT ELEVATION BACKGROUND This experiment demonstrates the use of colligative properties. The goal is to measure the molecular weight of a non-volatile solute by determining

More information

It can be hypothesized that as the number of Carbon atoms in an alcohol increases; the enthalpy of combustion will also become more negative.

It can be hypothesized that as the number of Carbon atoms in an alcohol increases; the enthalpy of combustion will also become more negative. Chemistry Lab Report Aim: The combustion of organic compounds produces large quantities of energy. These compounds range from that of alkanes, to alkenes to even alcohols. Ethanol is a commonly used fuel

More information

Observe and measure the effect of a solute on the freezing point of a solvent. Determine the molar mass of a nonvolatile, nonelectrolyte solute

Observe and measure the effect of a solute on the freezing point of a solvent. Determine the molar mass of a nonvolatile, nonelectrolyte solute Chapter 10 Experiment: Molar Mass of a Solid OBJECTIVES: Observe and measure the effect of a solute on the freezing point of a solvent. Determine the molar mass of a nonvolatile, nonelectrolyte solute

More information

Synthesis, Isolation, and Purification of an Ester

Synthesis, Isolation, and Purification of an Ester Synthesis, Isolation, and Purification of an Ester AP Chemistry Laboratory Introduction An ester is a chemical compound that is formed when an organic acid reacts with an alcohol. Esters frequently have

More information

Molar Mass by Freezing Point Depression AP Chemistry Laboratory #4

Molar Mass by Freezing Point Depression AP Chemistry Laboratory #4 Catalog No. AP6356 Publication No. 6356A Molar Mass by Freezing Point Depression AP Chemistry Laboratory #4 Introduction A procedure for determining the molar mass of a substance is very useful to chemists.

More information

Laboratory 1D: Volume Measurements

Laboratory 1D: Volume Measurements Purpose This lab will examine a variety of ways to measure the volume of liquids. Students will compare the accuracy and precision of the different methods. Discussion The volume of a substance refers

More information

EXPERIMENT 12: Empirical Formula of a Compound

EXPERIMENT 12: Empirical Formula of a Compound EXPERIMENT 12: Empirical Formula of a Compound INTRODUCTION Chemical formulas indicate the composition of compounds. A formula that gives only the simplest ratio of the relative number of atoms in a compound

More information

Chemistry 212 VAPOR PRESSURE OF WATER LEARNING OBJECTIVES

Chemistry 212 VAPOR PRESSURE OF WATER LEARNING OBJECTIVES Chemistry 212 VAPOR PRESSURE OF WATER LEARNING OBJECTIVES The learning objectives of this experiment are to explore the relationship between the temperature and vapor pressure of water. determine the molar

More information

EXPERIMENT 16: Charles Law of Gases V vs T

EXPERIMENT 16: Charles Law of Gases V vs T EXPERIMENT 16: Charles Law of Gases V vs T Materials: Thermometer Bunsen burner Ring stand Clamps 600ml beakers (2) Closed-tip syringe Ice Water Objectives 1. To put to work the model to verify Charles

More information

Density of Materials. Density p.1. v061813_810pm

Density of Materials. Density p.1. v061813_810pm Density of Materials v061813_810pm Objective: The student will be able to determine the density of a regular solid, an irregular solid, a liquid, and test their understanding of density by determination

More information

Refrigerant Gases. Supplemental Experiment 1

Refrigerant Gases. Supplemental Experiment 1 Supplemental Experiment 1 Refrigerant Gases Warning: do not do this experiment if you have a sensitivity to sulfites or have an asthmatic condition! Sulfites have been shown to cause severe asthma attacks

More information

Determination of the Molar Mass of a Volatile Liquid by Vapor Density

Determination of the Molar Mass of a Volatile Liquid by Vapor Density Background Determination of the Molar Mass of a Volatile Liquid by Vapor Density Chemical and physical methods for determining atomic and molecular formula weights or molar masses have been important historically

More information

UC Irvine FOCUS! 5 E Lesson Plan

UC Irvine FOCUS! 5 E Lesson Plan UC Irvine FOCUS! 5 E Lesson Plan Title: Charles Law with Balloons Grade Level and Course: 9-12 High School Chemistry; 8 th grade physical science Materials: 1000 ml beaker Hotplate Graduated cylinder Water

More information

Colligative Properties - Freezing Point Depression

Colligative Properties - Freezing Point Depression Purpose To observe freezing point depression of different solutions and calculate the molar mass of commercial antifreeze. Introduction In winter, trucks dispense dirt and salt onto the roads and antifreeze

More information

Determination of the Molar Mass of an Unknown Solid by Freezing Point Depression

Determination of the Molar Mass of an Unknown Solid by Freezing Point Depression Determination of the Molar Mass of an Unknown Solid by Freezing Point Depression GOAL AND OVERVIEW In the first part of the lab, a series of solutions will be made in order to determine the freezing point

More information

CHM112 Lab Molar Mass by Freezing Point Depression Grading Rubric

CHM112 Lab Molar Mass by Freezing Point Depression Grading Rubric Name Team Name CHM112 Lab Molar Mass by Freezing Point Depression Grading Rubric Criteria Points possible Points earned Lab Performance Printed lab handout and rubric was brought to lab 3 Safety and proper

More information

CHM Accuracy and the Measurement of Volume

CHM Accuracy and the Measurement of Volume CHM 130 - Accuracy and the Measurement of Volume PURPOSE: The purpose of this experiment is to practice using various types of volume measuring apparatus, focusing on their uses and accuracy. DISCUSSION:

More information

CHEM105: BIOCHEMISTRY AND SOCIETY Experiment 3 Intermolecular Forces and Evaporation. Organic Compounds: Alcohols and Alkanes

CHEM105: BIOCHEMISTRY AND SOCIETY Experiment 3 Intermolecular Forces and Evaporation. Organic Compounds: Alcohols and Alkanes CHEM105: BIOCHEMISTRY AND SOCIETY Experiment 3 Intermolecular Forces and Evaporation (ADAPTED FROM BRAD DELEEW) BACKGROUND Part I Organic Compounds: Alcohols and Alkanes You will work with two types of

More information

The Chemistry of Dyes Part I: The Synthesis of Indigo Dye

The Chemistry of Dyes Part I: The Synthesis of Indigo Dye The Chemistry of Dyes Part I: The Synthesis of Indigo Dye Name: Period: PURPOSE: To synthesize indigo dye in preparation for understanding how and why it dyes fabrics THEORY: Organic Chemistry is the study

More information

Experiment 4 Fractional Distillation of Unknown Mixture

Experiment 4 Fractional Distillation of Unknown Mixture Experiment 4 Fractional Distillation of Unknown Mixture In this experiment you are not going to synthesize a new compound but you are going to use the technique of fractional distillation to separate an

More information

YEAST RESPIRATION AND FERMENTATION

YEAST RESPIRATION AND FERMENTATION YEAST RESPIRATION AND FERMENTATION STUDENT HANDOUT...pages 1-6 TEACHER REFERENCE PAGES...pages 7-18 GAS CHROMATOGRAPH INSTRUCTIONS...pages 19-23 Yeast Respiration and Fermentation STUDENT HANDOUT Introduction

More information

SOLUBILITY OF A SALT IN WATER AT VARIOUS TEMPERATURES LAB

SOLUBILITY OF A SALT IN WATER AT VARIOUS TEMPERATURES LAB SOLUBILITY OF A SALT IN WATER AT VARIOUS TEMPERATURES LAB Purpose: Most ionic compounds are considered by chemists to be salts and many of these are water soluble. In this lab, you will determine the solubility,

More information

THERMOMETER CALIBRATION USING CONTROLLED TEMPERATURE BATHS

THERMOMETER CALIBRATION USING CONTROLLED TEMPERATURE BATHS Test Procedure for THERMOMETER CALIBRATION USING CONTROLLED TEMPERATURE Texas Department of Transportation TxDOT Designation: Tex-926-K Effective Date: August 1999 1. SCOPE 1.1 Calibrate thermometers by

More information

Gas Laws. E k = ½ (mass)(speed) 2. v101613_10am

Gas Laws. E k = ½ (mass)(speed) 2. v101613_10am Gas Laws v101613_10am Objective: In this lab you will become familiar with the Ideal Gas Law and Dalton s Law of Partial Pressures. You will be able to use the information collected along with stoichiometry

More information

Investigation M3: Separating Mixtures into Component Parts

Investigation M3: Separating Mixtures into Component Parts Investigation M3: Separating Mixtures into Component Parts Goals: Use various methods to separate mixtures, make inferences from temperature/time graphs, and identify substances. 81 Activity M3.3: What

More information

Title: Training Lab 1 Chemistry 11100, Fall Use of a balance a balance is used to measure the mass of solids in the chemistry lab.

Title: Training Lab 1 Chemistry 11100, Fall Use of a balance a balance is used to measure the mass of solids in the chemistry lab. Title: Training Lab 1 Chemistry 11100, Fall 2012 Introduction The purpose of this lab is to introduce you to a series of techniques that you will use in chemistry lab. For this lab, you will be using the

More information

Reaction of Magnesium with Hydrochloric Acid (Gas Laws) Chemicals Needed:

Reaction of Magnesium with Hydrochloric Acid (Gas Laws) Chemicals Needed: Reaction of Magnesium with Hydrochloric Acid (Gas Laws) Your Name: Date: Partner(s) Names: Objectives: React magnesium metal with hydrochloric acid, collecting the hydrogen over water. Calculate the grams

More information

-1- MOLECULAR WEIGHT DETERMINATION BY THE VICTOR MEYER METHOD

-1- MOLECULAR WEIGHT DETERMINATION BY THE VICTOR MEYER METHOD -1- MOLECULAR WEIGHT DETERMINATION BY THE VICTOR MEYER METHOD OBJECTIVE: To determine the molecular weight of an unknown liquid using the Victor Meyer apparatus. INTRODUCTION: The Victor Meyer method consists

More information

Experiment: TITRATION OF AN ACID WITH A BASE

Experiment: TITRATION OF AN ACID WITH A BASE Experiment: TITRATION OF AN ACID WITH A BASE INTRODUCTION: The word titration is derived from a French word, "titre" which means "to bestow a title upon or to standardize". The purpose of a chemical titration

More information

Experiment 1: Colligative Properties

Experiment 1: Colligative Properties Experiment 1: Colligative Properties Determination of the Molar Mass of a Compound by Freezing Point Depression. Objective: The objective of this experiment is to determine the molar mass of an unknown

More information

CHEM 2423 Recrystallization of Benzoic Acid EXPERIMENT 4 - Purification - Recrystallization of Benzoic acid

CHEM 2423 Recrystallization of Benzoic Acid EXPERIMENT 4 - Purification - Recrystallization of Benzoic acid EXPERIMENT 4 - Purification - Recrystallization of Benzoic acid Purpose: a) To purify samples of organic compounds that are solids at room temperature b) To dissociate the impure sample in the minimum

More information

Pre-Lab Exercises Lab 1: Scientific Measurement

Pre-Lab Exercises Lab 1: Scientific Measurement Pre-Lab Exercises Lab 1: Scientific Measurement Name Date Section 1. What is a hypothesis? 2. One meter equals millimeters. 3. Which has a larger volume, a liter or a quart? 4. If a cube had a volume of

More information

Pre-Lab Notebook Content: Your notebook should include the title, date, purpose, procedure; data tables.

Pre-Lab Notebook Content: Your notebook should include the title, date, purpose, procedure; data tables. Determination of Molar Mass by Freezing Point Depression M. Burkart & M. Kim Experimental Notes: Students work in pairs. Safety: Goggles and closed shoes must be worn. Dispose of all chemical in the plastic

More information

Lab #1: Determining the Empirical Formula of a Compound

Lab #1: Determining the Empirical Formula of a Compound Ms. Sonderleiter AP Chemistry Name: Date: Lab #1: Determining the Empirical Formula of a Compound Background: How did early chemists ever manage to determine the chemical formulas of compounds? What kind

More information

1. The Solubility of a Salt

1. The Solubility of a Salt 1. The Solubility of a Salt Objective In this experiment, you will determine the solubility of a given salt at various temperatures. Also you will prepare the solubility curve for your salt. Introduction

More information

EXPERIMENT 2 THE HYDROLYSIS OF t-butyl CHLORIDE. PURPOSE: To verify a proposed mechanism for the hydrolysis of t-butyl Chloride.

EXPERIMENT 2 THE HYDROLYSIS OF t-butyl CHLORIDE. PURPOSE: To verify a proposed mechanism for the hydrolysis of t-butyl Chloride. PURPOSE: To verify a proposed mechanism for the hydrolysis of t-butyl Chloride. PRINCIPLES: Once the Rate Law for a reaction has been experimentally established the next step is its explanation in terms

More information

Phase change lab questions Period: Physical Science

Phase change lab questions Period: Physical Science Phase change lab questions Period: Physical Science Name: Date: Pre-lab: (As always, write in complete sentences) 1. What should happen to the temperature of a substance while the substance is melting?

More information

Michael Faraday s T he Chemical Histor y of a Cand le

Michael Faraday s T he Chemical Histor y of a Cand le Michael Faraday s T he Chemical Histor y of a Cand le with Guides to L ectures, Teaching Guides & Student Activities This PDF is free for you to view and share for non-commercial purposes. Be sure to check

More information

Determination of Molar Mass by Boiling Point Elevation of Urea Solution

Determination of Molar Mass by Boiling Point Elevation of Urea Solution Determination of Molar Mass by Boiling Point Elevation of Urea Solution CHRISTIAN E. MADU, PhD AND BASSAM ATTILI, PhD COLLIN COLLEGE CHEMISTRY DEPARTMENT Purpose of the Experiment Determine the boiling

More information

Experiment 5: Molecular Weight Determination From Freezing Point Depression

Experiment 5: Molecular Weight Determination From Freezing Point Depression Experiment 5: Molecular Weight Determination From Freezing Point Depression PURPOSE To become familiar with colligative properties and to use them to determine the molar mass of a substance APPARATUS AND

More information

Percent Composition of Hydrates

Percent Composition of Hydrates Name Class Date Percent Composition of Hydrates You are a research chemist working for a company that is developing a new chemical moisture absorber and indicator. The company plans to seal the moisture

More information

Heats of Transition, Heats of Reaction, Specific Heats, and Hess s Law

Heats of Transition, Heats of Reaction, Specific Heats, and Hess s Law Heats of Transition, Heats of Reaction, Specific Heats, and Hess s Law GOAL AND OVERVIEW A simple calorimeter will be made and calibrated. It will be used to determine the heat of fusion of ice, the specific

More information

Figure 1: Experimental Set-up with Leveling Bulb

Figure 1: Experimental Set-up with Leveling Bulb Gas Laws Equipment Set-up and Leveling bulb discussion: A buret will be used to collect our gas product, so we can measure the volume of gas produced accurately. A leveling bulb (a plastic bottle with

More information

Materials 10-mL graduated cylinder l or 2-L beaker, preferably tall-form Thermometer

Materials 10-mL graduated cylinder l or 2-L beaker, preferably tall-form Thermometer VAPOR PRESSURE OF WATER Introduction At very low temperatures (temperatures near the freezing point), the rate of evaporation of water (or any liquid) is negligible. But as its temperature increases, more

More information

Hands-On Labs SM-1 Lab Manual

Hands-On Labs SM-1 Lab Manual EXPERIMENT 4: Separation of a Mixture of Solids Read the entire experiment and organize time, materials, and work space before beginning. Remember to review the safety sections and wear goggles when appropriate.

More information

# 14 Synthesis of Salicylic Acid from Aspirin Tablets

# 14 Synthesis of Salicylic Acid from Aspirin Tablets # 14 Synthesis of Salicylic Acid from Aspirin Tablets Purpose: Acetyl salicylic acid is extracted from aspirin tablets, then is hydrolyzed to form another white solid, salicylic acid. Introduction: The

More information

Chemistry of Biodiesel Production

Chemistry of Biodiesel Production Chemistry of Biodiesel Production Background and Purpose Biodiesel is one of the fuels that are being considered as an alternative to fossil fuels. The purpose of this lab is to examine the production

More information

General Chemistry I (FC, 09-10) Lab #3: The Empirical Formula of a Compound. Introduction

General Chemistry I (FC, 09-10) Lab #3: The Empirical Formula of a Compound. Introduction General Chemistry I (FC, 09-10) Introduction A look at the mass relationships in chemistry reveals little order or sense. The ratio of the masses of the elements in a compound, while constant, does not

More information

Cellular Respiration and Photosynthesis

Cellular Respiration and Photosynthesis Cellular Respiration and Photosynthesis INTRODUCTION Respiration is important in maintaining the energy needs of the cell. In photosynthesis light energy is changed to chemical energy and stored in food.

More information

EXPERIMENT 29 SYNTHESIS OF ASPIRIN

EXPERIMENT 29 SYNTHESIS OF ASPIRIN EXPERIMENT 29 SYNTHESIS OF ASPIRIN INTRODUCTION Aspirin is one of the most widely used medications in the world. It is employed as an analgesic (pain relief), an anti-pyretic (fever control) and an anti

More information

Exploring Convection Currents Lab Activity

Exploring Convection Currents Lab Activity NAME: Introduction DATE: Exploring Convection Currents Lab Activity Nearly all of the earth s energy comes from the sun. Some of this radiant energy is reflected by water droplets and dust particles in

More information

Determining Equivalent Weight by Copper Electrolysis

Determining Equivalent Weight by Copper Electrolysis Purpose The purpose of this experiment is to determine the equivalent mass of copper based on change in the mass of a copper electrode and the volume of hydrogen gas generated during an electrolysis reaction.

More information

How Can the Percent Composition of a Salt, Sand and Iron Mixture be Determined?

How Can the Percent Composition of a Salt, Sand and Iron Mixture be Determined? Lab 2 Name How Can the Percent Composition of a Salt, Sand and Iron Mixture be Determined? Pre-Lab Assignment This written pre-lab is worth 15% (3 points) of your lab report grade and must be turned in

More information

Determination of Molar Mass by Freezing-Point Depression

Determination of Molar Mass by Freezing-Point Depression DETERMINATION OF MOLAR MASS BY FREEZING-POINT DEPRESSION 141 Determination of Molar Mass by Freezing-Point Depression OBJECTIVES: Gain familiarity with colligative properties of nonelectrolyte solutions

More information

The Empirical Formula of a Compound

The Empirical Formula of a Compound The Empirical Formula of a Compound Lab #5 Introduction A look at the mass relationships in chemistry reveals little order or sense. The ratio of the masses of the elements in a compound, while constant,

More information

Colligative Properties: Freezing Point Depression and Molecular Weight

Colligative Properties: Freezing Point Depression and Molecular Weight Purpose: Colligative Properties: Freezing Point Depression and Molecular Weight The first purpose of this lab is to experimentally determine the van't Hoff (i) factor for two different substances, sucrose

More information

EXPERIMENT 13: THE IDEAL GAS LAW AND THE MOLECULAR WEIGHT OF GASES

EXPERIMENT 13: THE IDEAL GAS LAW AND THE MOLECULAR WEIGHT OF GASES Name Section EXPERIMENT 13: THE IDEAL GAS LAW AND THE MOLECULAR WEIGHT OF GASES PRE-LABORATORY QUESTIONS The following preparatory questions should be answered before coming to lab. They are intended to

More information

A Determination of the Molecular Mass of an Unknown Gas

A Determination of the Molecular Mass of an Unknown Gas A Determination of the Molecular Mass of an Unknown Gas In 1811, Amadeo Avogadro, an Italian scientist, published his now famous theorem, called Avogadro s Hypothesis. Avogadro postulated that equal volumes

More information

Thermodynamics. Theory: We can summarize the four laws of thermodynamics as follows:

Thermodynamics. Theory: We can summarize the four laws of thermodynamics as follows: 1 Thermodynamics Objective: To investigate the zeroth and first laws of thermodynamics. To calculate properties such as specific heat. To investigate the ideal gas law. To become familiar with basic P-V

More information

Structure of caffeine: O CH 3 CH 3

Structure of caffeine: O CH 3 CH 3 1 Extraction of Caffeine Introduction Caffeine Caffeine occurs naturally in tea leaves and coffee beans. Cocoa beans, used to produce chocolate, contain a compound that is nearly identical in structure

More information

Recovery of Elemental Copper from Copper (II) Nitrate

Recovery of Elemental Copper from Copper (II) Nitrate Recovery of Elemental Copper from Copper (II) Nitrate Objectives: Challenge: Students should be able to - recognize evidence(s) of a chemical change - convert word equations into formula equations - perform

More information

States of Matter and the Kinetic Molecular Theory - Gr10 [CAPS]

States of Matter and the Kinetic Molecular Theory - Gr10 [CAPS] OpenStax-CNX module: m38210 1 States of Matter and the Kinetic Molecular Theory - Gr10 [CAPS] Free High School Science Texts Project This work is produced by OpenStax-CNX and licensed under the Creative

More information

A Beer s Law Experiment

A Beer s Law Experiment A Beer s Law Experiment Introduction There are many ways to determine concentrations of a substance in solution. So far, the only experiences you may have are acid-base titrations or possibly determining

More information

7H Solutions. Unit Menu Main Menu Equipment

7H Solutions. Unit Menu Main Menu Equipment 7H Solutions How can we tell whether a liquid is a mixture? 7H1 7H 7H3 7H4 7H5 7H6 7H7 7H8 7H9 Measure the boiling point of water Is tap water pure? Measure density How much salt can we get from rock salt?

More information

Procedure. Day 1 - Calibration of the Calorimeter. (Part I) The Heat Capacity of the Calorimeter.

Procedure. Day 1 - Calibration of the Calorimeter. (Part I) The Heat Capacity of the Calorimeter. Thermochemistry Experiment 10 Thermochemistry is the study of the heat energy involved in chemical reactions and changes of physical state. Heat energy is always spontaneously transferred from hotter to

More information

experiment5 Understanding and applying the concept of limiting reagents. Learning how to perform a vacuum filtration.

experiment5 Understanding and applying the concept of limiting reagents. Learning how to perform a vacuum filtration. 81 experiment5 LECTURE AND LAB SKILLS EMPHASIZED Synthesizing an organic substance. Understanding and applying the concept of limiting reagents. Determining percent yield. Learning how to perform a vacuum

More information

Calorimetry: Determining the Heat of Fusion of Ice and the Heat of Vaporization of Liquid Nitrogen - Chemistry I Acc

Calorimetry: Determining the Heat of Fusion of Ice and the Heat of Vaporization of Liquid Nitrogen - Chemistry I Acc Calorimetry: Determining the Heat of Fusion of Ice and the Heat of Vaporization of Liquid Nitrogen - Chemistry I Acc O B J E C T I V E 1. Using a simple calorimeter, Determine the heat of fusion of ice

More information

THE DETERMINATION OF THE RATE EQUATION FOR A REACTION

THE DETERMINATION OF THE RATE EQUATION FOR A REACTION THE DETERMINATION OF THE RATE EQUATION FOR A REACTION In this experiment you will study the reaction of Hydrogen Peroxide and Iodide ion given by the following equation: 2 I 1- + 2 H 1+ + H 2 O 2 I 2 +

More information

EXPERIMENT 12N CALORIMETRY

EXPERIMENT 12N CALORIMETRY EXPERIMENT 12N CALORIMETRY FV 7/28/2016 MATERIALS: PURPOSE: OBJECTIVES: Styrofoam cup and lid, stir bar, magnetic stir plate, digital thermometer, 250 ml beaker, two 100 ml graduated cylinders, aluminum

More information

PARADISE VALLEY COMMUNITY COLLEGE PHYSICS 101 - INTRODUCTION TO PHYSICS LABORATORY. Calorimetry

PARADISE VALLEY COMMUNITY COLLEGE PHYSICS 101 - INTRODUCTION TO PHYSICS LABORATORY. Calorimetry PARADISE VALLEY COMMUNITY COLLEGE PHYSICS 101 - INTRODUCTION TO PHYSICS LABORATORY Calorimetry Equipment Needed: Large styrofoam cup, thermometer, hot water, cold water, ice, beaker, graduated cylinder,

More information

Chemical Reactions: Making Table Salt

Chemical Reactions: Making Table Salt Chem 100 Section Experiment 5 Name Partner s Name Chemical Reactions: Making Table Salt Introduction During chemical reactions, substances combine with each other in a definite proportion by mass, meaning

More information

Lab 9. Colligative Properties an Online Lab Activity

Lab 9. Colligative Properties an Online Lab Activity Prelab Assignment Before coming to lab: Lab 9. Colligative Properties an Online Lab Activity Chemistry 162 - K. Marr Revised Winter 2014 This lab exercise does not require a report in your lab notebook.

More information

Standardization of NaOH

Standardization of NaOH EXPERIMENT 18 Prepared by Edward L. Brown, Lee University The student will become familiar with the techniques of titration and the use of a primary standard, Potassium Hydrogen Phthalate (KHP). Buret

More information

What is a Chemical Reaction?

What is a Chemical Reaction? Lab 8 Name What is a Chemical Reaction? Macroscopic Indications and Symbolic Representations Pre-Lab Assignment This written pre-lab is worth 25% (5 POINTS) of your lab report grade and must be turned

More information

Phase Diagram of tert-butyl Alcohol

Phase Diagram of tert-butyl Alcohol Phase Diagram of tert-butyl Alcohol Bill Ponder Department of Chemistry Collin College Phase diagrams are plots illustrating the relationship of temperature and pressure relative to the phase (or state

More information

Instruction Manual and Experiment Guide F. Basic Calorimetry Set TD-8557A

Instruction Manual and Experiment Guide F. Basic Calorimetry Set TD-8557A Instruction Manual and Experiment Guide 012-03060F Basic Calorimetry Set TD-8557A Al Cu W Table of Contents Introduction......................................................................... 1 Notes

More information

EXPERIMENT 4 THE DETERMINATION OF THE CALORIC CONTENT OF A CASHEW NUT

EXPERIMENT 4 THE DETERMINATION OF THE CALORIC CONTENT OF A CASHEW NUT EXPERIMENT 4 THE DETERMINATION OF THE CALORIC CONTENT OF A CASHEW NUT Textbook reference: pp103-105 Purpose: In this Activity, students determine how many calories are released per gram when cashews burn

More information

state and explain how the internal energy and the absolute (kelvin) temperature are related....

state and explain how the internal energy and the absolute (kelvin) temperature are related.... 6 N08/4/PHYSI/SP2/ENG/TZ0/XX+ A2. This question is about ideal gases. (a) State what is meant by an ideal gas....... For an ideal gas define internal energy. state and explain how the internal energy and

More information

HOW CAN WE DETERMINE THE ACTUAL PERCENTAGE OF H 2 O 2 IN A DRUGSTORE BOTTLE OF HYDROGEN PEROXIDE

HOW CAN WE DETERMINE THE ACTUAL PERCENTAGE OF H 2 O 2 IN A DRUGSTORE BOTTLE OF HYDROGEN PEROXIDE HOW CAN WE DETERMINE THE ACTUAL PERCENTAGE OF H 2 O 2 IN A DRUGSTORE BOTTLE OF HYDROGEN PEROXIDE Introduction Hydrogen peroxide is regarded as an "environmentally friendly" alternative to chlorine for

More information

GAS LAWS. Lab #10 PROCEDURE: Part A: Charles Law:

GAS LAWS. Lab #10 PROCEDURE: Part A: Charles Law: GAS LAWS In 1660, Robert Boyle, an English philosopher, performed an experiment in which he showed that the volume of a trapped amount of air varied inversely with the pressure applied to it. However,

More information

Determination of the Amount of Acid Neutralized by an Antacid Tablet Using Back Titration

Determination of the Amount of Acid Neutralized by an Antacid Tablet Using Back Titration Determination of the Amount of Acid Neutralized by an Antacid Tablet Using Back Titration GOAL AND OVERVIEW Antacids are bases that react stoichiometrically with acid. The number of moles of acid that

More information

CSUS Department of Chemistry Experiment 4 Chem.1A

CSUS Department of Chemistry Experiment 4 Chem.1A Name: Section: Experiment 4: Synthesis of Alum Pre-laboratory Assignment (Read through the experiment before starting!) 1. a) What are the strong acid and strong base used in this synthesis? b) What should

More information

Aspirin Synthesis H 3 PO 4

Aspirin Synthesis H 3 PO 4 Aspirin Synthesis Experiment 5 Aspirin is the common name for the compound acetylsalicylic acid, widely used as a fever reducer and as a pain killer. Salicylic acid, whose name comes from Salix, the willow

More information