Chemistry 101. Chemistry Experiments for the Home Acidity Determination Using Indicators

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "Chemistry 101. Chemistry Experiments for the Home Acidity Determination Using Indicators"

Transcription

1 Chemistry 101 Chemistry Experiments for the Home Acidity Determination Using Indicators I. Objective: To determine the acidity of a variety of common substances by the use of indicators. To prepare your own indicators from naturally occurring substances. II. Discussion: Acid-base indicators are generally large organic molecules that react with acids and bases. When they react, the structure of the molecules change and so does the color. Many colored solutions found around the home can be used as acid-base indicators: fruit and vegetable juices, food colorings, inks, and even tea. Some indicators such as litmus and phenolphthalein change color near the neutral point as a solution changes from acidic to basic or vice versa. Others are one color in strongly acidic solution and a different color in weakly acidic and basic solutions. Still others pass through a variety of color changes as the ph changes. Natural indicators have been used for hundreds of years, long before chemists made synthetic acid-base indicators. Robert Boyle described indicators extracted from roses and other plant materials in his book; "The Experimental History of Colors" published in Boyle listed among the properties of acids, their ability to turn plant juices red. Red cabbage contains two principal types of plant dyes, anthocyanin and flavonol. The anthocyanin pigments are red in strongly acidic solution, blue in neutral and weakly basic solutions and colorless in strongly basic solutions. Weakly acidic solutions contain some of the red form and some of the blue form, and thus appear purple. Flavonol pigments are colorless in acidic and neutral solutions, and yellow in basic solutions. Weakly basic solutions thus contain both blue (anthocyanin) and yellow (flavonol) dyes and appear to be green. The color chart for red cabbage indicator is:

2 Red cabbage is not the only natural indicator that goes through a variety of color changes. Cherry juice, for example, may be red (ph = 2.5), orange (ph = 4.5), brown (ph = 7), or green (ph = 10). Litmus is a pigment obtained from lichens (a combination of algae and a fungus). It is red (pink) under acidic conditions and blue under basic conditions. Soaking paper in a litmus solution makes litmus paper. Turmeric is a spice, which is made from ground turmeric tuber, and can be found alone or as an ingredient in curry powder. Turmeric is yellow in acid solutions and pink in basic solutions. Phenolphthalein is a chemical used by chemists as an acid-base indicator, and sold by pharmaceutical companies as a laxative. It is colorless in acid solutions and pink in basic solutions. Goldenrod paper contains a dye that is blue in concentrated solutions of strong acids, gold in other acidic solutions, and red in basic solutions. In this experiment you will test a variety of household substances with some of the above indicators to determine acidities and basicities. III. Materials: Red and blue litmus paper, turmeric, 5 Ex-Lax tablets, rubbing alcohol (isopropyl alcohol), toothpicks, red cabbage, plastic cups, white Styrofoam egg carton with the top removed, vinegar, baking soda solution (1 teaspoon of baking soda in a cup of distilled water), colorless soda (e.g., 7-Up), Milk of Magnesia solution (1 antacid tablet in a cup of distilled water), lemon juice, aspirin (3 tablets in a cup of distilled water), tap water, distilled water, salt solution (1 teaspoon in a cup of distilled water), detergent solution (1 teaspoon liquid detergent in a cup of distilled water), household ammonia water (make sure you wear eye protection when working with ammonia water; also work in a well ventilated area), plastic stirrers, plastic bag, straws. IV. Procedure: A. Red and Blue Litmus: Obtain pieces of red and blue litmus paper from the chemistry lab or from your instructor. Before you test the solutions listed in Table 1, try to predict if they will be acidic, basic, or neutral. Test the solutions with red and blue litmus paper. To test a solution with red litmus paper, transfer a drop of the solution onto the paper with the stirrer. Record the color that is produced in the Table. Wash off the stirrer with a little distilled water before you proceed to the next solution. A piece of litmus paper can be used to test two solutions. One test can be done on each end of the paper. Repeat the tests using blue litmus in the same fashion.

3 In the Table, record whether the solutions you tested are acidic, basic, or neutral. Remember that a neutral solution will not change the color of either red or blue litmus. Table 1 Solution Prediction: Acidic, Basic, or Neutral Color of red litmus paper Color of blue litmus paper Result: Acidic, Basic, or Neutral Distilled water Vinegar Ammonia water Baking soda Colorless soda Milk of Magnesia Lemon juice Tap water Detergent Aspirin solution Salt water

4 Turmeric Indicator: Prepare the turmeric indicator solution as follows. Add 1 teaspoon of turmeric to ¼ cup of rubbing alcohol. Stir and allow to stand for several minutes before using. Place a straw in a solution to be tested. Put you finger over the top of the straw. Remove the straw from the solution, and by slightly raising your finger, transfer 1 drop of the solution to one of the wells in the egg carton. Transfer 1 drop of the turmeric indicator solution to this well and mix with a toothpick. Observe the color, and record your observations in Table 2. Is the solution acidic or basic? In the same fashion, test the rest of the solutions, and record your observations in the Table. Table 2 Solution Color of indicator Acidic or Basic Distilled water Vinegar Ammonia water Baking soda Colorless soda Milk of Magnesia Lemon juice Tap water Detergent Aspirin solution Salt water

5 Phenolphthalein Indicator: Prepare the phenolphthalein indicator as follows. Crush 5 Ex-Lax tablets as fine as possible. If they are individually wrapped, you can crush them with a hammer before removing the wrappers. Mix the crushed tablets with 1 cup of rubbing alcohol. Place a straw in a solution to be tested. Put you finger over the top of the straw. Remove the straw from the solution, and by slightly raising your finger, transfer 1 drop of the solution to one of the wells in the egg carton. Transfer 1 drop of the phenolphthalein indicator solution to this well and mix with a toothpick. Observe the color, and record your observations in Table 3. Is the solution acidic or basic? In the same fashion, test the rest of the solutions, and record your observations in the Table. Table 3 Solution Color of indicator Acidic or Basic Distilled water Vinegar Ammonia water Baking soda Colorless soda Milk of Magnesia Lemon juice Tap water Detergent Aspirin solution Salt water

6 D. Red Cabbage Indicator: Prepare the red cabbage indicator as follows. Chop up 1 cup of red cabbage. Add it to a cup of water and heat the mixture on the stove or in a microwave until the water is a deep purple color. Pour the liquid away from the solid (a process called decanting) and allow it to cool. Transfer 2 teaspoonfuls of the solution to be tested to one of the wells in the egg carton. Transfer 1 teaspoonful of the red cabbage indicator solution to this well and mix with a plastic stirrer or straw. Observe the color, and record your observations in Table 4. Try to tell if the solution is strongly or weakly acidic or basic, or if it is neutral. Repeat the test with the other solutions and record your observations in the Table. Table 4 Solution Color of indicator Acid or Base Strength Distilled water Vinegar Ammonia water Baking soda Colorless soda Milk of Magnesia Lemon juice Tap water Detergent Aspirin solution Salt water

7 E. Other Natural Indicators: Decide which indicators to use from the list below (or others you may wish to try). Squash or rip up berries, petals, etc. and place them in a plastic bag. Add enough hot water to thoroughly soak the plant materials. Seal the bag and knead it, rubbing the contents together. When the plant dye has colored the water, open a corner of the bag and pour the liquid out into a container. Keep the solids in the bag. Possible indicator sources are: roses, violets, primroses, hydrangeas, cherries, beets, blueberries, turnip skins, plum skins, radish skins, rhubarb skins, red grapes, red wine, grape juice concentrate. Transfer 1 teaspoonful of the solution to be tested to one of the wells in the egg carton. Transfer 1 teaspoonful of the natural indicator solution to this well and mix with a plastic stirrer or straw. Observe the color of the resulting solution, and record your observations in Table 5. Table 5 Color of the Solution Plant indicator Test solution Strongly acidic (lemon juice) Weakly acidic (soda) Neutral (distilled water) Weakly basic (baking soda) Strongly acidic (ammonia water)

8 V. Questions: What color is litmus under acidic conditions? What color is litmus under basic conditions? Identify each of the follow ing solutions as being acidic, basic neutral: Both red and blue litmus paper end up blue. Neither color litmus paper changes color. Both red and blue litmus paper, end up red. Is red cabbage indicator more useful than an indicator such as litmus for determining the acidity or basicity of a solution? Is a solution which turns red cabbage indicator green, acidic or is it basic? Is a solution which turns red cabbage indicator violet, acidic or is it basic? If a solution turns red cabbage indicator bright yellow, is it safe to touch or taste? What color is turmeric under acidic conditions? What color is turmeric under basic conditions? What color is phenolphthalein under acidic conditions? What color is phenolphthalein under basic conditions? Which of the plant extracts that you chose for Part E could be used as acid-base indicators?

Return to Lab Menu. Acids and Bases in Your House

Return to Lab Menu. Acids and Bases in Your House Return to Lab Menu Acids and Bases in Your House OBJECTIVES Isolate a natural acid-base indicator. Determine the acid-base properties of common household solutions. INTRODUCTION Acids and bases are among

More information

Acids and Bases. AND a widemouth container of the following solids:

Acids and Bases. AND a widemouth container of the following solids: Acids and Bases GOAL To introduce students to acids and bases. MATERIALS: 3 10oz clear plastic cups 1 4 oz. bottle white vinegar - labeled Acid 1 4 oz. bottle of water - labeled Water 1 4 oz. bottle of

More information

Of Cabbages and Kings

Of Cabbages and Kings Of Cabbages and Kings Learning Objectives: Students will learn about indicators, acids, bases, and the ph scale. GRADE LEVEL K 8 SCIENCE TOPICS Physical Properties Techniques Chemical Reactions PROCESS

More information

A PRIMER ON ph. A Presentation for ASTA Conference September 30-October 1, 2008

A PRIMER ON ph. A Presentation for ASTA Conference September 30-October 1, 2008 A PRIMER ON ph A Presentation for ASTA Conference September 30-October 1, 2008 Rebecca Richardson Martha Gothard Director Science Specialist Regional In-Service Education Center AMSTI University of Montevallo

More information

Chem 100 Lab Experiment #9 - ACID/BASE INDICATORS

Chem 100 Lab Experiment #9 - ACID/BASE INDICATORS Lab #9 Chem 100 Lab Experiment #9 - ACID/BASE INDICATORS Name: Purpose: In this laboratory we will investigate how indicators can be used to test for the presence of acids or bases in a number of common

More information

Questions for Discussion. Introduction. What is ph? Neutralization

Questions for Discussion. Introduction. What is ph? Neutralization Questions for Discussion Why do leaves change color in autumn? What are acids and bases? How does red cabbage fit in? How are all these things related? Introduction The questions above may not seem related,

More information

5 ACIDS, BASES AND SALTS

5 ACIDS, BASES AND SALTS 5 ACIDS, BASES AND SALTS TEXTBOOK QUESTIONS AND ANSWERS Q.1. Taste the following substances and enter the result in the following table : Substance Taste (Sour / bitter / any other) Lemon juice Orange

More information

Household Acids and Bases

Household Acids and Bases Household Acids and Bases Computer 28 Many common household solutions contain acids and bases. Acid-base indicators, such as litmus and red cabbage juice, turn different colors in acidic and basic solutions.

More information

Natural Indicators. Natural Indicators and Household Substances

Natural Indicators. Natural Indicators and Household Substances elearning 2009 Introduction Natural Indicators Natural Indicators and Household Substances Roses are red, violets are blue or are they? Red roses, as well as many other flowers and fruits, contain natural

More information

We use in our daily life a large

We use in our daily life a large 5 Acids, Bases and Salts We use in our daily life a large number of substances such as lemon, tamarind, common salt, sugar and vinegar. Do they have the same taste? Let us recall tastes of some edible

More information

Lesson Plan 16 Cool Chemistry - DIY ph Indicator

Lesson Plan 16 Cool Chemistry - DIY ph Indicator Lesson Plan 16 Cool Chemistry - DIY ph Indicator Brief description Red cabbage juice is a natural ph indicator making this classic activity one of the most popular chemistry experiments for children. The

More information

EXPERIMENT 20: Determination of ph of Common Substances

EXPERIMENT 20: Determination of ph of Common Substances Materials: ph paper and color chart (ph range 3 to 12) or ph meter distilled water white vinegar household ammonia (or baking soda) spot plate test or 3 small test tubes stirring rod solutions / fruits

More information

Kool Demo for Acid-Base Reactions

Kool Demo for Acid-Base Reactions Kool Demo for Acid-Base Reactions Kool Demo for Acid-Base Reactions Adapted from : http://www.stevespanglerscience.com/lab/experiments/color-changing-milk-of-magnesia Materials: Red cabbage juice indicator

More information

VANDERBILT STUDENT VOLUNTEERS FOR SCIENCE. Acids and Bases. Fall 2012

VANDERBILT STUDENT VOLUNTEERS FOR SCIENCE. Acids and Bases. Fall 2012 VANDERBILT STUDENT VOLUNTEERS FOR SCIENCE Acids and Bases Fall 2012 GOAL: To introduce students to acids and bases. MATERIALS 3 10oz clear plastic cups 1 4 oz. bottle white vinegar - labeled Acid 1 4 oz.

More information

Acids & Bases: Using Purple Cabbage as a ph indicator. Grade 9 Activity Plan

Acids & Bases: Using Purple Cabbage as a ph indicator. Grade 9 Activity Plan Acids & Bases: Using Purple Cabbage as a ph indicator Grade 9 Activity Plan 1 Acids, Bases & Purple Cabbage Objectives: 1. To demonstrate the basic physical and chemical properties of acids and bases.

More information

ROSE ANTHOCYANINS AS ACID BASE INDICATORS

ROSE ANTHOCYANINS AS ACID BASE INDICATORS ROSE ANTHOCYANINS AS ACID BASE INDICATORS ph/acid Base Indicators A ph indicator is halochromic chemical compound that is added in small amounts to a solution so that the ph (acidity or basicity) of the

More information

Physical and Chemical Changes

Physical and Chemical Changes Physical and Chemical Changes Jana Barrow West Point Jr. High 2775 W 550 N 801-402-8100 West Point, UT 84015 jbarrow@dsdmail.net Eighth Grade Integrated Science Standard I: Students will understand the

More information

Notes. Making colour - Dye

Notes. Making colour - Dye Making colour - Dye Making colour - Dye Dyes are used to colour many of the things we see and use everyday, including food, hair and clothing. Dyes can be natural (made from plants) or synthetic (made

More information

Acids and Bases: Cabbage Juice ph Indicator

Acids and Bases: Cabbage Juice ph Indicator Acids and Bases: Cabbage Juice ph Indicator Student Advanced Version Acids and bases are found in a variety of everyday items, including food and drink, medicine, and cleaning products. In this lab, we

More information

SNEAK PEAK inside ACTIVITY. ADVANCE PREPARATION see next page for more details Dilute alcohol with water Set out plastic cups, etc.

SNEAK PEAK inside ACTIVITY. ADVANCE PREPARATION see next page for more details Dilute alcohol with water Set out plastic cups, etc. Reaction: Yes or No? Learning Objectives: Students will list and identify three characteristics of chemical reactions. GRADE LEVEL 3 8 SCIENCE TOPICS Solutions and Mixtures Chemical Reactions PROCESS SKILLS

More information

CHM 130LL: ph, Buffers, and Indicators

CHM 130LL: ph, Buffers, and Indicators CHM 130LL: ph, Buffers, and Indicators Many substances can be classified as acidic or basic. Acidic substances contain hydrogen ions, H +, while basic substances contain hydroxide ions, OH. The relative

More information

Properties of Acids and Bases

Properties of Acids and Bases Lab 22 Properties of Acids and Bases TN Standard 4.2: The student will investigate the characteristics of acids and bases. Have you ever brushed your teeth and then drank a glass of orange juice? What

More information

The Acid Test Grade Nine

The Acid Test Grade Nine Ohio Standards Connection: Physical Sciences Benchmark B Explain how atoms react with each other to form other substances and how molecules react with each other or other atoms to form even different substances.

More information

Acids & Bases Around the House Use a ph indicator to find acids and bases

Acids & Bases Around the House Use a ph indicator to find acids and bases Use a ph indicator to find acids and bases Description: Visitors predict whether various household solutions are acids or bases, and test their hypotheses using a universal ph indicator. Then, visitors

More information

Lesson Plan: How Do We Know What is Healthy Water?

Lesson Plan: How Do We Know What is Healthy Water? Lesson Plan: How Do We Know What is Healthy Water? Estimated Time: 1-3 days ph /Chlorine / Hardness State Standards taught and addressed Grade 8: Standards Taught (and evaluated at end of lesson) Science

More information

Household Acids and Bases

Household Acids and Bases Household Acids and Bases GRADE LEVEL INDICATORS Experiment Demonstrate that the ph scale (0-14) is used to measure acidity and classify substances or solutions as acidic, basic, or neutral. 21 Develop

More information

Teacher Demo: Turning Water into Wine into Milk into Beer

Teacher Demo: Turning Water into Wine into Milk into Beer SNC2D/2P Chemical Reactions/Chemical Reactions and their Practical Applications Teacher Demo: Turning Water into Wine into Milk into Beer Topics evidence of chemical change types of chemical reactions

More information

Elements of Chemistry Acids and Bases Teacher s Guide

Elements of Chemistry Acids and Bases Teacher s Guide Teacher s Guide oneone oee Grade Level: 9 12 Curriculum Focus: Physical Science Lesson Duration: Two class periods Program Description Explore the chemistry of acids and bases to see how fundamental they

More information

Acids, Bases, and ph

Acids, Bases, and ph CHAPTER 9 1 SECTION Acids, Bases, and Salts Acids, Bases, and ph KEY IDEAS As you read this section, keep these questions in mind: What properties do acids have? What properties do bases have? How can

More information

Introduction. ph = log [H + ]

Introduction. ph = log [H + ] Visualizing ph 2010, 1992 by David A. Katz. All rights reserved. Permission granted for classroom use. All reproductions must include original copyright. David A. Katz Chemist, Educator, Science Communicator,

More information

EXPERIMENT 4 Acid Strength

EXPERIMENT 4 Acid Strength EXPERIMENT 4 Acid Strength Introduction Many common substances are either acids or bases. Some acids, like stomach acid are necessary for our health, while others, like sulfuric acid are dangerous and

More information

Acids, Bases and Salts

Acids, Bases and Salts Acids, Bases and Salts 2 HAPTER Tips and Tricks Acids are sour in taste and bases are bitter in taste. Indicators are chemical substances which give different colours in acidic and basic solutions. If

More information

Experiment 16-Acids, Bases and ph

Experiment 16-Acids, Bases and ph Definitions acid-an ionic compound that releases or reacts with water to form hydrogen ion (H + ) in aqueous solution. They taste sour and turn litmus red. Acids react with certain metals such as zinc,

More information

Dry Ice Color Show Dry Ice Demonstrations

Dry Ice Color Show Dry Ice Demonstrations elearning 2009 Introduction Dry Ice Color Show Dry Ice Demonstrations Publication No. 95016 Add a small piece of solid carbon dioxide to a colored indicator solution and watch as the solution immediately

More information

ANSWER KEY. Acids, Bases, and Solutions. Chapter Project Worksheet 1 1. Answers will vary. Sample: cherries, blueberries,

ANSWER KEY. Acids, Bases, and Solutions. Chapter Project Worksheet 1 1. Answers will vary. Sample: cherries, blueberries, Chapter Project Worksheet 1 1. Answers will vary. Sample: cherries, blueberries, and grass 2. Answers will vary. Sample: Cut 5 g of cherries into small pieces and place in blender. Blend for two minutes,

More information

Syllabus OC18 Use litmus or a universal indicator to test a variety of solutions, and classify these as acidic, basic or neutral

Syllabus OC18 Use litmus or a universal indicator to test a variety of solutions, and classify these as acidic, basic or neutral Chemistry: 9. Acids and Bases Please remember to photocopy 4 pages onto one sheet by going A3 A4 and using back to back on the photocopier Syllabus OC18 Use litmus or a universal indicator to test a variety

More information

Wherever chemical solutions are involved, ph matters. Some

Wherever chemical solutions are involved, ph matters. Some 47 Acids, Bases, and the ph Scale r e a d i n g Wherever chemical solutions are involved, ph matters. Some important chemical reactions, such as those involved in corrosion of iron or digestion of food,

More information

Final Assessment: Acids and Bases and the ph scale

Final Assessment: Acids and Bases and the ph scale Final Assessment: Acids and Bases and the ph scale In order to construct acid-base indicators using organic substances, it is first necessary to understand terms and concepts related to the ph scale. According

More information

Properties of Acids and Bases

Properties of Acids and Bases Properties of Acids and Bases (Adapted from Flinn Scientific Acid Base Test Kit I #AP4567) Introduction Battery acid, stomach acid, acid rain just a few acids in our everyday life! What does it mean when

More information

Overview Students explore ph with an emphasis on soil ph. This activity uses soils and vinegar solutions.

Overview Students explore ph with an emphasis on soil ph. This activity uses soils and vinegar solutions. Activity: Acid to A1ka1ine Grades 4-8 Overview Students explore ph with an emphasis on soil ph. This activity uses soils and vinegar solutions. Background One of the significant factors in growing successful

More information

Review and apply Investigation 5. Let s review Pages 311-312

Review and apply Investigation 5. Let s review Pages 311-312 Review and apply Investigation 5 Let s review Pages 311-312 1. After you tested all the known powders with all the test liquids, describe what you did to identify the unknown powder. Students should have

More information

Acids, Bases, and Indicators Colorful Chemistry

Acids, Bases, and Indicators Colorful Chemistry Cool Chemistry Show Activity 7 Acids, Bases, and Indicators Colorful Chemistry GOALS In this activity you will: Identify common household acids and bases. Identify characteristic properties of acids and

More information

Separation of Dyes by Paper Chromatography

Separation of Dyes by Paper Chromatography Cautions: The FD&C food dyes used are concentrated and may stain clothing and skin. Do not ingest any of the food dyes or food samples used in this lab. Purpose: The purpose of this experiment is to determine

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

Acid 7 Base. 1. Describe two things hydrochloric acid does in your body system. 2. What does sodium hydrogencarbonate do in your body system?

Acid 7 Base. 1. Describe two things hydrochloric acid does in your body system. 2. What does sodium hydrogencarbonate do in your body system? Acids and Bases acid: a compound that, when dissolved in water, forms a solution with a ph less than 7 base: a compound that, when dissolved in water, forms a solution with a ph greater than 7 ph: the

More information

Name of the Lesson : ACIDS, BASES & SALTS. C lass : 10 th Class No. of Periods : 8 ACADEMIC STANDARDS TO BE ACHIEVED : 1) Conceptual Understanding :

Name of the Lesson : ACIDS, BASES & SALTS. C lass : 10 th Class No. of Periods : 8 ACADEMIC STANDARDS TO BE ACHIEVED : 1) Conceptual Understanding : Name of the Lesson : ACIDS, BASES & SALTS C lass : 10 th Class No. of Periods : 8 ACADEMIC STANDARDS TO BE ACHIEVED : 1) Conceptual Understanding : Definitions : Children are able to define Concepts of

More information

Letter to the Student... 5 Test-Taking Checklist... 6 Next Generation Sunshine State Standards Correlation Chart... 7

Letter to the Student... 5 Test-Taking Checklist... 6 Next Generation Sunshine State Standards Correlation Chart... 7 Table of Contents Letter to the Student..................................... 5 Test-Taking Checklist.................................... 6 Next Generation Sunshine State Standards Correlation Chart...

More information

Typical dyeing process for cotton

Typical dyeing process for cotton Typical dyeing process for cotton DYEING PROCEDURE FOR COTTON WITH NATURAL DYES Requirements: Natural Dye: Mordants: Alum, Ferrous sulphate, Stannous chloride Soft water (hardness less than 50 ppm.) Dye

More information

ACIDS AND BASES SAFETY PRECAUTIONS

ACIDS AND BASES SAFETY PRECAUTIONS ACIDS AND BASES Mild acids and bases are used in cooking (their reaction makes biscuits and bread rise). Acids such as those in our stomachs eat away at food or digest it. Strong acids and bases are used

More information

EXPERIMENT 10 Chemistry 110. Solutions Part 2 ACIDS, BASES, AND ELECTROLYTES

EXPERIMENT 10 Chemistry 110. Solutions Part 2 ACIDS, BASES, AND ELECTROLYTES EXPERIMENT 10 Chemistry 110 Solutions Part 2 ACIDS, BASES, AND ELECTROLYTES PURPOSE: The purpose of this experiment is to determine the properties of solutions of acids, bases and electrolytes. Students

More information

1. According to the Food Guide Pyramid, how many daily servings do we need of fruits?

1. According to the Food Guide Pyramid, how many daily servings do we need of fruits? NAME HOUR VIDEO WORKSHEET 1. According to the Food Guide Pyramid, how many daily servings do we need of fruits? 2. How many daily servings do we need of vegetables according to the Food Guide Pyramid?

More information

Acidity in the Soil. Unit. Year levels 5 6. About this activity. Demonstrating ph levels in substances. Curriculum Links. Science

Acidity in the Soil. Unit. Year levels 5 6. About this activity. Demonstrating ph levels in substances. Curriculum Links. Science Unit Year levels 5 6 Acidity in the Soil growth and survival of living things are The affected by the physical conditions of their environment (ACSSU094). Scientific knowledge is used to inform personal

More information

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. CHE 1400 - Spring 2015 - Chapter 7 Homework 7 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1)According to Arrhenius, an acid and a base will react

More information

Neutralizing an Acid and a Base

Neutralizing an Acid and a Base Balancing Act Teacher Information Objectives In this activity, students neutralize a base with an acid. Students determine the point of neutralization of an acid mixed with a base while they: Recognize

More information

Chapter 6. Solution, Acids and Bases

Chapter 6. Solution, Acids and Bases Chapter 6 Solution, Acids and Bases Mixtures Two or more substances Heterogeneous- different from place to place Types of heterogeneous mixtures Suspensions- Large particles that eventually settle out

More information

Herbal Stick Deodorant. No Sweat Foot Spray

Herbal Stick Deodorant. No Sweat Foot Spray Herbal Stick Deodorant No Sweat Foot Spray 1-1.5 tablespoons grated beeswax 1 tablespoon shea butter (or cocoa butter) 1 tablespoon coconut oil 1 tablespoon cornstarch 1 tablespoon baking soda 10 drops

More information

EXPERIMENT 10: TITRATION AND STANDARDIZATION

EXPERIMENT 10: TITRATION AND STANDARDIZATION EXPERIMENT 10: TITRATION AND STANDARDIZATION PURPOSE To determine the molarity of a NaOH solution by titrating it with a standard HCl solution. To determine the molarity of acetic acid in vinegar using

More information

Experiment 9: Acids and Bases Adapted from: Chemistry, Experimental Foundations, 4th Ed. Laboratory Manual, by Merrill, Parry & Bassow.

Experiment 9: Acids and Bases Adapted from: Chemistry, Experimental Foundations, 4th Ed. Laboratory Manual, by Merrill, Parry & Bassow. Chem 121 Lab Clark College Experiment 9: Acids and Bases Adapted from: Chemistry, Experimental Foundations, 4th Ed. Laboratory Manual, by Merrill, Parry & Bassow. Content Goals: Increase understanding

More information

Lab 25. Acid-Base Titration and Neutralization Reactions: What Is the Concentration of Acetic Acid in Each Sample of Vinegar?

Lab 25. Acid-Base Titration and Neutralization Reactions: What Is the Concentration of Acetic Acid in Each Sample of Vinegar? Lab 25. Acid-Base Titration and Neutralization Reactions: What Is the Concentration of Acetic Acid in Each Sample of Vinegar? Introduction Vinegar is basically a solution of acetic acid (CH3COOH). It is

More information

Chemists use the ph value to measure how acidic or basic a solution is. The ph scale runs from 0 to 14:

Chemists use the ph value to measure how acidic or basic a solution is. The ph scale runs from 0 to 14: The ph Value Chemists use the ph value to measure how acidic or basic a solution is. The ph scale runs from 0 to 14: If the ph value is lower than 7 (0 to 6.99) the solution contains more H + ions than

More information

Dissolving of sodium hydroxide generates heat. Take care in handling the dilution container.

Dissolving of sodium hydroxide generates heat. Take care in handling the dilution container. TITRATION: STANDARDIZATION OF A BASE AND ANALYSIS OF STOMACH ANTACID TABLETS 2009, 1996, 1973 by David A. Katz. All rights reserved. Reproduction permitted for education use provided original copyright

More information

TEACHER ACTIVITY GUIDE

TEACHER ACTIVITY GUIDE Page 1/5 TEACHER ACTIVITY GUIDE EFFECT OF HEAT & ph ON COLOR & TEXTURE OF GREEN VEGETABLES Taken from IFT Experiments in Food Science Series Color plays a key role in establishing consumer acceptability

More information

TABLE OF CONTENTS CLEAR JEL -- 2 CANNING APPLE PIE FILLING -- 3 CANNING BLUEBERRY PIE FILLING -- 4 CANNING CHERRY PIE FILLING -- 5

TABLE OF CONTENTS CLEAR JEL -- 2 CANNING APPLE PIE FILLING -- 3 CANNING BLUEBERRY PIE FILLING -- 4 CANNING CHERRY PIE FILLING -- 5 TABLE OF CONTENTS CLEAR JEL -- 2 CANNING APPLE PIE FILLING -- 3 CANNING BLUEBERRY PIE FILLING -- 4 CANNING CHERRY PIE FILLING -- 5 CANNING FESTIVE MINCEMEAT PIE FILLING -- 6 CANNING GREEN TOMATO PIE FILLING

More information

Reaction in a Bag. Scientific Method Demonstrations

Reaction in a Bag. Scientific Method Demonstrations elearning 2009 Introduction Reaction in a Bag Scientific Method Demonstrations Publication No. 91419 Careful observation is the foundation of science, leading to questions about what we have observed how,

More information

Determination of Specific Nutrients in Various Foods. Abstract. Humans need to consume food compounds such as carbohydrates, proteins, fats,

Determination of Specific Nutrients in Various Foods. Abstract. Humans need to consume food compounds such as carbohydrates, proteins, fats, Determination of Specific Nutrients in Various Foods Abstract Humans need to consume food compounds such as carbohydrates, proteins, fats, and vitamins to meet their energy requirements. In this lab, reagents

More information

WORKSHEET: ph and Water 23 Lab Instructor: Lab Day & Time: Student name(s): drain cleaner flat soda pop window cleaner ammonia.

WORKSHEET: ph and Water 23 Lab Instructor: Lab Day & Time: Student name(s): drain cleaner flat soda pop window cleaner ammonia. WORKSHEET: ph and Water 23 Lab Instructor: Lab Day & Time: Student name(s): DATA AND ANALYSIS ph Substance ph Value Substance ph Value Substance ph Value pure water apple juice dish soap sugar water beer

More information

PART I: PREPARATION OF SOLUTIONS AND STANDARDIZATION OF A BASE

PART I: PREPARATION OF SOLUTIONS AND STANDARDIZATION OF A BASE TITRATION: STANDARDIZATION OF A BASE AND ANALYSIS OF STOMACH ANTACID TABLETS 2009, 1996, 1973 by David A. Katz. All rights reserved. Reproduction permitted for education use provided original copyright

More information

Acid-Base Indicator Useful Indicators

Acid-Base Indicator Useful Indicators Chemistry 101 - H Acids and Bases This presentation was created by Professor Carl H. Snyder Chemistry Department University of Miami Coral Gables, FL 33124 CSnyder@miami.edu Chapter 10 - Acids and Bases

More information

6.8 Measuring the Acidity of Solutions Page 160

6.8 Measuring the Acidity of Solutions Page 160 6.8 Measuring the Acidity of Solutions Page 160 PRESCRIBED LEARNING OUTCOMES measure substances and solutions according to ph, solubility, and concentration KNOWLEDGE ph is the measure of the tendency

More information

ph Measurements of Common Substances

ph Measurements of Common Substances Chem 100 Section Experiment 10 Name Partner s Name Introduction ph Measurements of Common Substances The concentration of an acid or base is frequently expressed as ph. Historically, ph stands for the

More information

Sugar Cookies. Ice Box Cookies. Hannah Christiane Hansen Cox. Hannah Christiane Hansen Cox. Ingredients: Ingredients:

Sugar Cookies. Ice Box Cookies. Hannah Christiane Hansen Cox. Hannah Christiane Hansen Cox. Ingredients: Ingredients: Sugar Cookies 1 heaping cup lard 1 1/3 cups sugar 2 eggs - well beaten 1 cup canned milk (evaporated) or ½ and ½ 5 cups flour 4 teaspoons baking powder ¼ teaspoon salt 2 teaspoons vanilla Mix flour, baking

More information

ph Test #1: Scaling Common Liquids (From a series of 5)

ph Test #1: Scaling Common Liquids (From a series of 5) ph ph Test #1: Scaling Common Liquids (From a series of 5) Adapted from: Acid Tests in Environmental Education in the Schools. Braus, Judy and David Wood. Peace Corps, 1993. Grade Level: basic Duration:

More information

ANALYSIS OF VITAMIN C

ANALYSIS OF VITAMIN C Purpose To learn how to analyze food for vitamin C content and to examine various sources for vitamin C content. Caution Handle the glassware with caution to prevent breakage. When using a burner in the

More information

Chemical versus Physical Changes

Chemical versus Physical Changes Chemical versus Physical Changes Permission to Copy - This document may be reproduced for non-commercial educational purposes Copyright 2009 General Electric Company What are physical and chemical changes?

More information

IDENTIFICATION OF POLYMERS 1998 by David A. Katz. All rights reserved

IDENTIFICATION OF POLYMERS 1998 by David A. Katz. All rights reserved IDENTIFICATION OF POLYMERS 1998 by David A. Katz. All rights reserved David A. Katz Chemist, Educator, Science Communicator, and Consultant 133 N. Desert Stream Dr., Tucson, AZ 85745 Voice/Fax: 520-624-2207

More information

ph: Measurement and Uses

ph: Measurement and Uses ph: Measurement and Uses One of the most important properties of aqueous solutions is the concentration of hydrogen ion. The concentration of H + (or H 3 O + ) affects the solubility of inorganic and organic

More information

Etching using chemicals

Etching using chemicals Etching using chemicals Free tutorial Artsandtechniques.com Arts and Techniques School RJDS inc. Etching using chemicals There are several ways to etch metal, this technique uses a chemical. The etching

More information

Describing Acids and Bases

Describing Acids and Bases Section 3 Describing Acids and Bases 3 Describing Acids and Bases Objectives After this lesson, students will be able to L.3.3.1 Name the properties of acids and bases. L.3.3.2 Identify where acids and

More information

Chemical Changes. Measuring a Chemical Reaction. Name(s)

Chemical Changes. Measuring a Chemical Reaction. Name(s) Chemical Changes Name(s) In the particle model of matter, individual atoms can be bound tightly to other atoms to form molecules. For example, water molecules are made up of two hydrogen atoms bound to

More information

APPLE PIE FILLING (Source: Complete Guide to Home Canning, USDA, 2009)

APPLE PIE FILLING (Source: Complete Guide to Home Canning, USDA, 2009) APPLE PIE FILLING Blanched, sliced fresh apples 3 1/2 cups 6 quarts Granulated sugar 3/4 cup + 2 Tablespoons 5 1/2 cups ClearJel (not Instant Clear Jel) * 1/4 cup 1 1/2 cups Cinnamon 1/2 teaspoon 1 Tablespoon

More information

Experiment 7: Titration of an Antacid

Experiment 7: Titration of an Antacid 1 Experiment 7: Titration of an Antacid Objective: In this experiment, you will standardize a solution of base using the analytical technique known as titration. Using this standardized solution, you will

More information

GELATIN "CELL" DIFFUSION

GELATIN CELL DIFFUSION GELATIN "CELL" DIFFUSION Sizes of cells vary greatly, depending on whether they are prokaryotic or eukaryotic, and also by cell type (some neurons are a meter long!). No matter what its size, materials

More information

Chapter 6: Mixtures. Overall Objectives 46. 6.1 Introduction 46. Time Required: 6.2 Types of mixtures 46

Chapter 6: Mixtures. Overall Objectives 46. 6.1 Introduction 46. Time Required: 6.2 Types of mixtures 46 Chapter 6: Mixtures Overall Objectives 46 6.1 Introduction 46 6.2 Types of mixtures 46 6.3 Like dissolved like 46 6.4 Soap 47 6.5 Summary 47 Experiment 6: Mix it Up! 48 Review 52 Notes 52 Time Required:

More information

Chemistry Unit Test Review

Chemistry Unit Test Review SNC 2DI Chemistry Unit Test Review Note: this review sheet only covers the second half of our chemistry unit. You should use our mid-unit test review sheet to recall concepts from the first half of the

More information

Lesson 4. Temperature change

Lesson 4. Temperature change 54 Lesson 4 Temperature change T E A C H E R G U I D E Lesson summary Students meet scientist Jason Williams, an industrial chemist who designs the materials and processes for making solar cells. He explains

More information

The Creative Homemaking Guide to. Quick Bread Recipes. by Rachel Paxton

The Creative Homemaking Guide to. Quick Bread Recipes. by Rachel Paxton The Creative Homemaking Guide to Quick Bread Recipes by Rachel Paxton ABOUT CREATIVE HOMEMAKING: Visit Creative Homemaking for all of your homemaking needs. Creative Homemaking offers cleaning hints, a

More information

Ice Cream Lab & Application Questions

Ice Cream Lab & Application Questions Deep Freeze 1 Ice Cream Lab & Application Questions Name: Period: Date: Overview Have you ever wondered what it is about throwing salt on ice that makes it melt? And just why does it melt? Where does the

More information

Fluoride Strengthens Teeth

Fluoride Strengthens Teeth Fluoride Strengthens Teeth Two hard-boiled eggs Fluoride gel or solution, 4 to 6 oz. (from dental office) Three clean plastic containers Several cans of dark soda Water 1. Place a hard-boiled egg in one

More information

How do you digest milk? In this experiment you will test the ability of two substances, an acid and enzyme, to break down protein.

How do you digest milk? In this experiment you will test the ability of two substances, an acid and enzyme, to break down protein. 3.3 (page 1) Science Projects For ALL Students Digestion How do you digest milk? In this experiment you will test the ability of two substances, an acid and enzyme, to break down protein. Digestion is

More information

1. Qualitative Analysis of Chromium, Iron, and Copper

1. Qualitative Analysis of Chromium, Iron, and Copper 1. Qualitative Analysis of Chromium, Iron, and Copper Introduction We have used copper and iron as basic materials since the Bronze and Iron Ages, but our extensive use of chromium began only after the

More information

SNEAK PEAK inside ACTIVITY. ADVANCE PREPARATION see next page for more details Cut up steel wool Mix Kool-Aid solutions OPTIONAL EXTRAS

SNEAK PEAK inside ACTIVITY. ADVANCE PREPARATION see next page for more details Cut up steel wool Mix Kool-Aid solutions OPTIONAL EXTRAS Kool Colors Learning Objectives: Students learn how different factors affect the rate of chemical reactions. GRADE LEVEL 2 8 SCIENCE TOPICS Solutions and Mixtures Techniques Chemical Reactions PROCESS

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

ACIDS, BASES AND SALTS

ACIDS, BASES AND SALTS Acids are those chemical substances which have a sour taste. Bases are those chemical substances which have a bitter taste. A salt is an ionic compound which dissociates to yield a positive ion other than

More information

Taste a Rainbow of Colors with Fruits and Veggies

Taste a Rainbow of Colors with Fruits and Veggies TOOLKIT #6 LESSON PLAN: Taste a Rainbow of Colors 1 Taste a Rainbow of Colors with Fruits and Veggies Grades: K-5 Designed by: SuperKids Nutrition Inc. in partnership with the American Institute for Cancer

More information

Name. Lab 3: ENZYMES. In this lab, you ll investigate some of the properties of enzymes.

Name. Lab 3: ENZYMES. In this lab, you ll investigate some of the properties of enzymes. Name Lab 3: ENZYMES In this lab, you ll investigate some of the properties of enzymes. So what are enzymes? Enzymes are large protein molecules (macromolecules) They catalyze or speed up chemical reactions

More information

NULEAN SCRUMPTIOUS FOOD RECIPES

NULEAN SCRUMPTIOUS FOOD RECIPES NULEAN SCRUMPTIOUS FOOD RECIPES Here are some addition ideas for meals while doing the NuLean Cleanse. A key to choosing foods for this program is to go back to basics. Buy items with the least amount

More information

III. BACKGROUND KNOWLEDGE

III. BACKGROUND KNOWLEDGE Chemical Bonds and Reactions (Water) Grade Level: 7 (Applied Technology) Presented by: James Rubright, Three Oaks Middle School, Fort Myers, Florida Length of Unit: Ten Daily Lessons and Activities I.

More information

Chemistry IPA. To complete this Interest Project Patch, Cadette, Senior, and Ambassador Girl Scouts must complete:

Chemistry IPA. To complete this Interest Project Patch, Cadette, Senior, and Ambassador Girl Scouts must complete: Chemistry IPA Girl Scouts of Wisconsin Badgerland Council For Girl Scout Cadettes, Seniors and Ambassadors Created by Women in Chemistry At Michigan State University To complete this Interest Project Patch,

More information

Percentage or Depth of Shade Dyeing using Procion MX or Acid Dyes. There are two concepts that will help you in understanding controlled use of dyes.

Percentage or Depth of Shade Dyeing using Procion MX or Acid Dyes. There are two concepts that will help you in understanding controlled use of dyes. Percentage or Depth of Shade Dyeing using Procion MX or Acid Dyes If you want to achieve reliable, reproducible dyeing results, are interested in dyeing to match or achieve exact results, or wish to produce

More information

School of Chemistry, NUI, Galway

School of Chemistry, NUI, Galway KITCHEN CHEMISTRY School of Chemistry, NUI, Galway Table of Contents Acids and Bases... 2 Red Cabbage Indicator... 2 Baking Soda Volcano... 5 Cork Rocket... 6 Disappearing Shell... 7 Fruit Battery... 8

More information