Q1. In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate.
|
|
|
- Ernest West
- 7 years ago
- Views:
Transcription
1 Q. In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate. Explain why chlorine (Cl 2 ) is a gas at room temperature, but sodium chloride (NaCl) is a solid at room temperature. Chlorine Sodium chloride Include a description of the bonding and structure of chlorine and sodium chloride in your answer Extra space (Total 6 marks) Page of 9
2 Q2. Oil rigs are used to drill for crude oil. Digital Vision/Photodisc (a) Drills are made from an alloy of iron. The diagrams show the particles in the alloy and in pure iron. Use the diagrams to explain why the alloy is harder than pure iron. (2) (b) Drill heads contain diamonds. Tick ( ) two reasons why diamonds are hard. Reason Tick ( ) Diamonds have a giant covalent structure. Diamonds have high melting points. Diamonds are unreactive. Diamonds have strong bonds between carbon atoms. (2) Page 2 of 9
3 (c) Methane gas is often found where crude oil is found. The diagram shows how atoms bond in methane. Only the outer electrons are shown. (i) Draw a ring around the correct answer to complete the sentence. a compound. Methane is an element. a mixture. () Draw a ring around the correct answer to complete each sentence. C 4 H 4 The formula of methane is C 4 H CH 4 () (iii) Name the type of bond between the carbon and hydrogen atoms in methane.... () (d) Explain why methane is a gas at 20 C. (2) (Total 9 marks) Page 3 of 9
4 Q3. (a) In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate. The salt called potassium chloride is made when potassium hydroxide solution reacts with hydrochloric acid. potassium hydroxide solution + hydrochloric acid potassium chloride solution + water Describe a method for making crystals of potassium chloride from potassium hydroxide solution and hydrochloric acid. In this method you should: describe how you will add the correct amount of the hydrochloric acid to neutralise the potassium hydroxide solution describe how you will get crystals of potassium chloride. (6) (b) Ammonium nitrate is another salt. Ammonium nitrate is made when ammonia solution is neutralised with an acid. Name the acid to complete the word equation. ammonia +... acid ammonium nitrate () Page 4 of 9
5 (c) Read the information. Ammonium nitrate good or bad? Some farmers put a lot of ammonium nitrate on their farmland. Many people are worried about this use of ammonium nitrate. Rain water can wash the ammonium nitrate off the farmland and into rivers and lakes. The ammonium nitrate may get into drinking water supplies and could be harmful to health. (i) Why do some farmers put ammonium nitrate on their farmland? () Which one of the questions in the table cannot be answered by science alone? Tick ( ) one question. How much ammonium nitrate is in drinking water? Question Tick ( ) Should farmers stop using ammonium nitrate on their farmland? Is ammonium nitrate soluble in rain water? Give two reasons why this question cannot be answered by science alone. (3) (Total marks) Page 5 of 9
6 Q4. Read the information Graphene Scientists have made a new substance called graphene. The bonding and structure of graphene are similar to graphite. Graphene is made of a single layer of the same atoms as graphite. Graphene Graphite Use the information above and your knowledge of graphite to answer the questions. (a) This part of the question is about graphene. Choose the correct answer to complete each sentence. (i) ionic covalent metallic The bonds between the atoms in graphene are... () chromium carbon chlorine Graphene is made of... atoms. () (iii) In graphene each atom bonds to... other atoms. () Page 6 of 9
7 (b) This part of the question is about graphite. Graphite is used in pencils. Explain why. Use the diagrams to help you. (2) (Total 5 marks) Q5. Gold and gold ions are used as catalysts. (a) An atom of gold is represented as: Au Complete the sentences. The atomic number of gold is... The number of electrons in an atom of gold is... (2) (b) Scientists have found that gold nanoparticles are very good catalysts. Draw a ring around the correct answer to complete the sentence. hundred A gold nanoparticle contains a few thousand atoms. million () (c) The formation of a gold ion (Au 3+ ) from a gold atom (Au) is shown in the symbol equation. Au Au e (i) Complete the sentence. The particles lost when a gold atom becomes a gold ion are called... () Page 7 of 9
8 Draw a ring around the correct answer to complete the sentence. one. The number of these particles lost when a gold atom becomes a gold ion is two. three. () (d) Gold ions are used as a catalyst in the reaction to make chloroethene. How does a catalyst help a reaction? () (e) Chloroethene can react to make a thermosoftening polymer. (i) Draw a ring around the correct answer to complete the sentence. dissolve. When heated, a thermosoftening polymer will melt. solidify. () Polymer B is a different type of polymer. The diagram shows the structure of polymer B. How can you tell from the diagram that polymer B is not thermosoftening? () (Total 8 marks) Page 8 of 9
9 Q6. (a) The symbol equation for the decomposition of hydrogen peroxide is: 2H 2 O 2 2H 2 O + O 2 Complete the word equation for the decomposition of hydrogen peroxide. Hydrogen peroxide () (b) A student did an experiment to see how quickly hydrogen peroxide decomposes. The student used the apparatus shown below to measure the volume of oxygen. (i) Draw a straight line of best fit to complete the graph. () (iii) Draw a circle around the anomalous point on the graph. What is the volume of oxygen given off after 5 seconds? ()... cm 3 () Page 9 of 9
10 (iv) How did the volume of oxygen change between 0 and 25 seconds? () (c) The student wanted to make the reaction faster. Draw a ring around the correct answer to complete each sentence. higher. (i) To make the reaction faster, the temperature should be lower. the same. () more dilute. To make the reaction faster, the hydrogen peroxide should be more concentrated. the same. () (d) The diagram represents the bonding in oxygen. O=O Draw a ring around the correct answer to complete each sentence. share (i) When two oxygen atoms bond, the atoms transfer electrons. delocalise () ionic The oxygen atoms are joined by metallic bonds. covalent () simple molecules. (iii) Oxygen is made of a giant lattice. macromolecules. () Page 0 of 9
11 (e) When hydrogen peroxide decomposes water is produced. Which two statements in the table explain why water is a liquid at room temperature? Tick ( ) the two statements. Statement Tick ( ) Water has a boiling point of 00 C. Water is made of ions. Water has a melting point lower than room temperature. Water has a giant covalent structure. (2) (Total 2 marks) Q7. This question is about the planet Mars. Tristan3D/Shutterstock (a) Mars is a red colour in the sky at night. The red colour of Mars is because of iron oxide. Iron oxide is an ionic compound. Draw a ring around the correct answer to complete each sentence. giant lattices. Ionic compounds are made of polymer chains. simple molecules. () Page of 9
12 (b) Many spacecraft have been sent to Mars. Parts of these spacecraft are made from polymers. (i) Polymers that behave like shape memory alloys are used in spacecraft. The shape memory polymers are cooled and compressed. These polymers are stored on the spacecraft until needed. Suggest how the polymers could be made to return to their original shape. () Thermosetting polymers are used for the tiles on the outside of spacecraft. The diagram shows the structure of a thermosetting polymer. Explain, in terms of structure, why some polymers are thermosetting. (2) (c) Instrumental methods such as GC MS are used to analyse substances found on Mars. In GC MS, gas chromatography columns are linked to mass spectrometers. (i) What does gas chromatography do to the substances? () Give two reasons for using instrumental methods for analysis. 2 (2) (Total 7 marks) Page 2 of 9
13 M. Marks awarded for this answer will be determined by the Quality of Written Communication (QWC) as well as the standard of the scientific response. 0 marks No relevant content Level ( 2 marks) There is a statement about the bonding and / or structure or melting / boiling point of chlorine or sodium chloride. Level 2 (3 4 marks) There are statements about the bonding and / or structure of chlorine or sodium chloride. Level 3 (5 6 marks) There are statements about the bonding and / or structure of chlorine and sodium chloride. There is an explanation of why chlorine is a gas or sodium chloride is a solid. Examples of chemistry points made in response: Chlorine: covalent bonds between atoms forming (simple) molecules no / weak attraction / bonds between molecules low boiling point Sodium chloride: ionic bonds or electrostatic attraction strong bonds in all directions between oppositely charged ions forming giant lattice large amounts of energy needed to break bonds high melting point [6] M2. (a) (alloy) atoms / ions / particles not in layers accept layers are distorted accept different (size) particles / atoms so, (alloy) layers / atoms / ions / particles can t slide if no other mark awarded allow (an alloy) is a mixture of metals for mark Page 3 of 9
14 CH 4 (b) diamonds have a giant covalent structure diamonds have strong bonds between carbon atoms (c) (i) a compound (iii) covalent (d) methane has a low boiling point or boiling point less than 20 C molecules because it has small molecules accept it has forces between molecules accept weak forces between molecules for 2 marks [9] Page 4 of 9
15 M3. (a) Marks awarded for this answer will be determined by the Quality of Written Communication (QWC) as well as the standard of the scientific response. Examiners should also apply a best-fit approach to the marking. 0 marks No relevant content. Level (-2 marks) There is a simple description of a laboratory procedure for obtaining potassium chloride. Level 2 (3-4 marks) There is a clear description of a laboratory procedure for obtaining potassium chloride from potassium hydroxide solution and hydrochloric acid that does not necessarily allow the procedure to be completed successfully by another person. The answer must include the use of an indicator or a method of obtaining crystals. Level 3 (5-6 marks) There is a detailed description of a laboratory procedure for obtaining potassium chloride from potassium hydroxide solution and hydrochloric acid that can be followed by another person. The answer must include the use of an indicator and a method of obtaining crystals. examples of the chemistry/social points made in the response: One reagent in beaker (or similar) Add (any named) indicator Add other reagent Swirl or mix Add dropwise near end point Stop addition at change of indicator colour Note volume of reagent added Repeat without indicator, adding same volume of reagent or remove indicator using charcoal Pour solution into basin / dish Heat (using Bunsen burner) Leave to crystallise / leave for water to evaporate / boil off water Accept any answers based on titration 6 (b) nitric (acid) allow HNO 3 ignore incorrect formula (c) (i) because it is a fertiliser / helps plants grow allow plant food do not accept pesticide / herbicide / neutralising soil Page 5 of 9
16 tick by: Should farmers stop using ammonium nitrate on their land? any two from: cannot be done by experiment accept difficult to get / not enough evidence based on opinion / view allow must be done by survey ethical or economic issue if top box ticked allow mark for drinking water varies from place to place 2 [] M4. (a) (i) covalent two different answers indicated gains 0 marks carbon two different answers indicated gains 0 marks (iii) 3 two different answers indicated gains 0 marks (b) layers can slide / slip because there are no bonds between layers accept because weak forces / bonds between layers or so (pieces of) graphite rubs / breaks off or graphite left on the paper [5] M5. (a) (b) hundred (c) (i) electron(s) Page 6 of 9
17 three (d) changes rate of reaction accept lowers activation energy or speeds up / slows down reaction accept reduces costs (e) (i) melt crosslinking allow answers on diagram or (covalent) bonds between polymers / chains allow bonds between layers do not allow intermolecular [8] M6. (a) oxygen and water both needed for mark allow hydrogen oxide for water in any order ignore formulae (b) (i) best fit line, omitting point at 0s straight line drawn through all correct points circle around point at 0 s allow any indication (iii) 7.5 allow ecf from candidate s line (iv) increases (with time) accept goes from 0 to 2.5 (c) (i) higher more concentrated Page 7 of 9
18 (d) (i) share covalent (iii) simple molecules (e) Water has a boiling point of 00 C Water has a melting point lower than room temperature [2] M7. (a) giant lattices (b) (i) heat / warm / increase the temperature allow reduce pressure do not accept melt (polymer) chains cannot slide because they have cross-links if no other mark awarded allow polymers do not melt for mark (c) (i) separates (substances) any two from: ignore reliable / precise / efficient ignore references to cost quick / rapid accurate can detect small quantities / sensitive 2 [7] Page 8 of 9
19 Page 9 of 9
Additional Science 4408 / Chemistry 4402
Version: 0/08/202 General Certificate of Secondary Education Additional Science 4408 / Chemistry 4402 Unit Chemistry 2 Mark Scheme 202 examination June series Mark schemes are prepared by the Principal
hij GCSE Additional Science Chemistry 2 Higher Tier Chemistry 2H SPECIMEN MARK SCHEME Version 1.0
hij GCSE Additional Science Chemistry 2 Higher Tier Chemistry 2H SPECIMEN MARK SCHEME Version.0 Copyright 20 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA)
Exampro GCSE Chemistry
Exampro GCSE Chemistry C2 Chapter 5 Higher Name: Class: Author: Date: Time: 73 Marks: 73 Comments: Page of 27 Q. (a) In this question you will be assessed on using good English, organising information
Specimen Paper. Time allowed! 60 minutes
Centre Number Surname Candidate Number Specimen Paper For Examiner s Use Other Names Candidate Signature Examiner s Initials General Certificate of Secondary Education Foundation Tier Question 1 Mark Chemistry
hij GCSE Additional Science Chemistry 2 Foundation Tier Chemistry 2F SPECIMEN MARK SCHEME Version 1.0
hij GCSE Additional Science Chemistry 2 Foundation Tier Chemistry 2F SPECIMEN MARK SCHEME Version.0 Copyright 20 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA)
Instructions Answer all questions in the spaces provided. Do all rough work in this book. Cross through any work you do not want to be marked.
GCSE CHEMISTRY Higher Tier Chemistry 1H H Specimen 2018 Time allowed: 1 hour 45 minutes Materials For this paper you must have: a ruler a calculator the periodic table (enclosed). Instructions Answer all
Candidate Style Answer
Candidate Style Answer Chemistry A Unit F321 Atoms, Bonds and Groups High banded response This Support Material booklet is designed to accompany the OCR GCE Chemistry A Specimen Paper F321 for teaching
WRITING CHEMICAL FORMULA
WRITING CHEMICAL FORMULA For ionic compounds, the chemical formula must be worked out. You will no longer have the list of ions in the exam (like at GCSE). Instead you must learn some and work out others.
Atomic Structure. Same atomic number Different mass number
Mass number Number of protons and neutrons Atomic number Number of protons Atomic Structure Cl 35 17 Atoms of the same element can have different numbers of neutrons - these atoms are called isotopes of
Cambridge International Examinations Cambridge International General Certificate of Secondary Education
Cambridge International Examinations Cambridge International General Certificate of Secondary Education *0123456789* CHEMISTRY 0620/03 Paper 3 Theory (Core) For Examination from 2016 SPECIMEN PAPER 1 hour
Q1. A student studied the reaction between dilute hydrochloric acid and an excess of calcium carbonate.
Q. A student studied the reaction between dilute hydrochloric acid and an excess of calcium carbonate. calcium carbonate + hydrochloric acid calcium chloride + water + carbon dioxide The student measured
Chapter 16: Tests for ions and gases
The position of hydrogen in the reactivity series Hydrogen, although not a metal, is included in the reactivity series because it, like metals, can be displaced from aqueous solution, only this time the
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
GCSE Further Additional Science. Higher Tier. Unit 2 Chemistry 3H SPECIMEN MARK SCHEME V1
GCSE Further Additional Science Higher Tier Unit 2 Chemistry 3H SPECIMEN MARK SCHEME V Copyright 202 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA) is a company
Coimisiún na Scrúduithe Stáit State Examinations Commission
2015. M33 Coimisiún na Scrúduithe Stáit State Examinations Commission LEAVING CERTIFICATE EXAMINATION, 2015 CHEMISTRY ORDINARY LEVEL TUESDAY, 16 JUNE AFTERNOON 2.00 TO 5.00 400 MARKS Answer eight questions
Chemistry Assessment Unit AS 1
Centre Number 71 Candidate Number ADVANCED SUBSIDIARY (AS) General Certificate of Education January 2011 Chemistry Assessment Unit AS 1 assessing Basic Concepts in Physical and Inorganic Chemistry [AC111]
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,
Question Bank Electrolysis
Question Bank Electrolysis 1. (a) What do you understand by the terms (i) electrolytes (ii) non-electrolytes? (b) Arrange electrolytes and non-electrolytes from the following substances (i) sugar solution
Coimisiún na Scrúduithe Stáit State Examinations Commission
Coimisiún na Scrúduithe Stáit State Examinations Commission LEAVING CERTIFICATE EXAMINATION, 2007 CHEMISTRY - ORDINARY LEVEL TUESDAY, 19 JUNE AFTERNOON 2.00 TO 5.00 400 MARKS Answer eight questions in
IB Chemistry. DP Chemistry Review
DP Chemistry Review Topic 1: Quantitative chemistry 1.1 The mole concept and Avogadro s constant Assessment statement Apply the mole concept to substances. Determine the number of particles and the amount
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
Chemical Reactions in Water Ron Robertson
Chemical Reactions in Water Ron Robertson r2 f:\files\courses\1110-20\2010 possible slides for web\waterchemtrans.doc Properties of Compounds in Water Electrolytes and nonelectrolytes Water soluble compounds
Name Class Date. What is ionic bonding? What happens to atoms that gain or lose electrons? What kinds of solids are formed from ionic bonds?
CHAPTER 1 2 Ionic Bonds SECTION Chemical Bonding BEFORE YOU READ After you read this section, you should be able to answer these questions: What is ionic bonding? What happens to atoms that gain or lose
EDEXCEL IGCSE chemistry (separate award)
EDEXCEL IGCSE chemistry (separate award) Section 1: Principles of chemistry a) States of matter 1.1 understand the arrangement, movement and energy of the particles in each of the three states of matter:
Specimen Paper. Chemistry 1F. Time allowed! 60 minutes
Centre Number Surname Candidate Number Specimen Paper For Examiner s Use Other Names Candidate Signature Examiner s Initials General Certificate of Secondary Education Foundation Tier Question 1 Mark Science
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,
Test Bank - Chapter 4 Multiple Choice
Test Bank - Chapter 4 The questions in the test bank cover the concepts from the lessons in Chapter 4. Select questions from any of the categories that match the content you covered with students. The
IB Chemistry 1 Mole. One atom of C-12 has a mass of 12 amu. One mole of C-12 has a mass of 12 g. Grams we can use more easily.
The Mole Atomic mass units and atoms are not convenient units to work with. The concept of the mole was invented. This was the number of atoms of carbon-12 that were needed to make 12 g of carbon. 1 mole
The Periodic Table: Periodic trends
Unit 1 The Periodic Table: Periodic trends There are over one hundred different chemical elements. Some of these elements are familiar to you such as hydrogen, oxygen, nitrogen and carbon. Each one has
Getting the most from this book...4 About this book...5
Contents Getting the most from this book...4 About this book....5 Content Guidance Topic 1 Atomic structure and the periodic table...8 Topic 2 Bonding and structure...14 Topic 2A Bonding....14 Topic 2B
KS3 Science: Chemistry Contents
summary KS3 Science MyWorks Guide Chemistry KS3 Science: Chemistry Mini zes: 40 Super zes: 5 Extension zes: 4 Skills zes: 6 TOTAL 54 What are MyWorks zes? MyWorks zes are short individual learning tasks
ANSWER KEY. Energy Levels, Electrons and IONIC Bonding It s all about the Give and Take!
ANSWER KEY Energy Levels, Electrons and IONIC Bonding It s all about the Give and Take! From American Chemical Society Middle School Chemistry Unit: Chapter 4 Content Statements: Distinguish the difference
HIGHER TIER CHEMISTRY MINI-MOCK UNIT 2 [C2.1, C2.2&C2.3, C2.4, C2.5, C2.6 and C2.7] (a) Name particles X and Y.
![HIGHER TIER CHEMISTRY MINI-MOCK UNIT 2 [C2.1, C2.2&C2.3, C2.4, C2.5, C2.6 and C2.7] (a) Name particles X and Y.](/thumbs/40/21177375.jpg "HIGHER TIER CHEMISTRY MINI-MOCK UNIT 2 [C2.1, C2.2&C2.3, C2.4, C2.5, C2.6 and C2.7] (a) Name particles X and Y.")
HIGHER TIER CHEMISTRY MINI-MOCK UNIT 2 [C2., C2.2&C2.3, C2.4, C2.5, C2.6 and C2.7] C2. Structure and Bonding Questions Q. The diagram shows a model of part of the giant lattice of a metal. (a) Name particles
EXPERIMENT 4: IONIC AND COVALENT PROPERTIES
EXPERIMENT 4: IONIC AND COVALENT PROPERTIES PURPOSE To measure and observe properties of various substances. To arrange the substances into groups on the basis of their properties. To learn the properties
States of Matter and the Kinetic Molecular Theory - Gr10 [CAPS]
![States of Matter and the Kinetic Molecular Theory - Gr10 [CAPS]](/thumbs/40/21739317.jpg "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
Physical Changes and Chemical Reactions
Physical Changes and Chemical Reactions Gezahegn Chaka, Ph.D., and Sudha Madhugiri, Ph.D., Collin College Department of Chemistry Objectives Introduction To observe physical and chemical changes. To identify
7.4. Using the Bohr Theory KNOW? Using the Bohr Theory to Describe Atoms and Ions
7.4 Using the Bohr Theory LEARNING TIP Models such as Figures 1 to 4, on pages 218 and 219, help you visualize scientific explanations. As you examine Figures 1 to 4, look back and forth between the diagrams
AN EXPERIMENT IN ALCHEMY: COPPER TO SILVER TO GOLD 2005, 2000, 1996 by David A. Katz. All rights reserved
AN EXPERIMENT IN ALCHEMY: COPPER TO SILVER TO GOLD 2005, 2000, 1996 by David A. Katz. All rights reserved INTRODUCTION One of the goals of the ancient alchemists was to convert base metals into gold. Although
CHAPTER 3: MATTER. Active Learning Questions: 1-6, 9, 13-14; End-of-Chapter Questions: 1-18, 20, 24-32, 38-42, 44, 49-52, 55-56, 61-64
CHAPTER 3: MATTER Active Learning Questions: 1-6, 9, 13-14; End-of-Chapter Questions: 1-18, 20, 24-32, 38-42, 44, 49-52, 55-56, 61-64 3.1 MATTER Matter: Anything that has mass and occupies volume We study
The energy level diagram for this reaction is shown below.
Q. Methanol can be made when methane reacts with oxygen. (a) The energy level diagram for this reaction is shown below. (i) What is the energy change represented by A? () (ii) Use the energy level diagram
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
Amount of Substance. http://www.avogadro.co.uk/definitions/elemcompmix.htm
Page 1 of 14 Amount of Substance Key terms in this chapter are: Element Compound Mixture Atom Molecule Ion Relative Atomic Mass Avogadro constant Mole Isotope Relative Isotopic Mass Relative Molecular
Unit 1 Chemical Changes and Structure Revision Notes
Unit 1 Revision Notes Rates of reaction The rate of reaction can be increased by: increasing the concentration of a solution decreasing the particle size of a solid increasing the temperature adding a
Unit 2: Quantities in Chemistry
Mass, Moles, & Molar Mass Relative quantities of isotopes in a natural occurring element (%) E.g. Carbon has 2 isotopes C-12 and C-13. Of Carbon s two isotopes, there is 98.9% C-12 and 11.1% C-13. Find
Cambridge International Examinations Cambridge International General Certificate of Secondary Education
Cambridge International Examinations Cambridge International General Certificate of Secondary Education *0123456789* CHEMISTRY 0620/04 Paper 4 Theory (Extended) For Examination from 2016 SPECIMEN PAPER
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
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
Unit 3 Notepack Chapter 7 Chemical Quantities Qualifier for Test
Unit 3 Notepack Chapter 7 Chemical Quantities Qualifier for Test NAME Section 7.1 The Mole: A Measurement of Matter A. What is a mole? 1. Chemistry is a quantitative science. What does this term mean?
CHEMICAL REACTIONS OF COPPER AND PERCENT YIELD KEY
CHEMICAL REACTIONS OF COPPER AND PERCENT YIELD Objective To gain familiarity with basic laboratory procedures, some chemistry of a typical transition element, and the concept of percent yield. Apparatus
Experiment 8 - Double Displacement Reactions
Experiment 8 - Double Displacement Reactions A double displacement reaction involves two ionic compounds that are dissolved in water. In a double displacement reaction, it appears as though the ions are
CHAPTER 10: INTERMOLECULAR FORCES: THE UNIQUENESS OF WATER Problems: 10.2, 10.6,10.15-10.33, 10.35-10.40, 10.56-10.60, 10.101-10.
CHAPTER 10: INTERMOLECULAR FORCES: THE UNIQUENESS OF WATER Problems: 10.2, 10.6,10.15-10.33, 10.35-10.40, 10.56-10.60, 10.101-10.102 10.1 INTERACTIONS BETWEEN IONS Ion-ion Interactions and Lattice Energy
Enthalpy of Reaction and Calorimetry worksheet
Enthalpy of Reaction and Calorimetry worksheet 1. Calcium carbonate decomposes at high temperature to form carbon dioxide and calcium oxide, calculate the enthalpy of reaction. CaCO 3 CO 2 + CaO 2. Carbon
Chapter 5 Student Reading
Chapter 5 Student Reading THE POLARITY OF THE WATER MOLECULE Wonderful water Water is an amazing substance. We drink it, cook and wash with it, swim and play in it, and use it for lots of other purposes.
Review - After School Matter Name: Review - After School Matter Tuesday, April 29, 2008
Name: Review - After School Matter Tuesday, April 29, 2008 1. Figure 1 The graph represents the relationship between temperature and time as heat was added uniformly to a substance starting at a solid
(1) e.g. H hydrogen that has lost 1 electron c. anion - negatively charged atoms that gain electrons 16-2. (1) e.g. HCO 3 bicarbonate anion
GS106 Chemical Bonds and Chemistry of Water c:wou:gs106:sp2002:chem.wpd I. Introduction A. Hierarchy of chemical substances 1. atoms of elements - smallest particles of matter with unique physical and
Mark Scheme (Results) January 2012. International GCSE Chemistry (4CH0) Paper 2C
Mark Scheme (Results) January 202 International GCSE Chemistry (4CH0) Paper 2C Edexcel and BTEC Qualifications Edexcel and BTEC qualifications come from Pearson, the world s leading learning company. We
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level *0123456789* CHEMISTRY 9701/02 Paper 2 AS Level Structured Questions For Examination from 2016 SPECIMEN
Properties and Classifications of Matter
PS-3.1 Distinguish chemical properties of matter (including reactivity) from physical properties of matter (including boiling point, freezing/melting point, density [with density calculations], solubility,
Chemical Equations & Stoichiometry
Chemical Equations & Stoichiometry Chapter Goals Balance equations for simple chemical reactions. Perform stoichiometry calculations using balanced chemical equations. Understand the meaning of the term
MOLES AND MOLE CALCULATIONS
35 MOLES ND MOLE CLCULTIONS INTRODUCTION The purpose of this section is to present some methods for calculating both how much of each reactant is used in a chemical reaction, and how much of each product
2 MATTER. 2.1 Physical and Chemical Properties and Changes
2 MATTER Matter is the material of which the universe is composed. It has two characteristics: It has mass; and It occupies space (i.e., it has a volume). Matter can be found in three generic states: Solid;
Cambridge International Examinations Cambridge International General Certificate of Secondary Education
ambridge International Examinations ambridge International General ertificate of Secondary Education *012345678* EMISTRY 0620/01 Paper 1 Multiple hoice (ore) For Examination from 2016 SPEIMEN PPER dditional
20.2 Chemical Equations
All of the chemical changes you observed in the last Investigation were the result of chemical reactions. A chemical reaction involves a rearrangement of atoms in one or more reactants to form one or more
hij GCSE Additional Science 2 Higher Tier Unit 6H SPECIMEN MARK SCHEME Version 1.0
hij GCSE Additional Science 2 Higher Tier Unit 6H SPECIMEN MARK SCHEME Version.0 Copyright 20 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA) is a company limited
4.5 Physical Properties: Solubility
4.5 Physical Properties: Solubility When a solid, liquid or gaseous solute is placed in a solvent and it seems to disappear, mix or become part of the solvent, we say that it dissolved. The solute is said
SCH 4C1 Unit 2 Problem Set Questions taken from Frank Mustoe et all, "Chemistry 11", McGraw-Hill Ryerson, 2001
SCH 4C1 Unit 2 Problem Set Questions taken from Frank Mustoe et all, "Chemistry 11", McGraw-Hill Ryerson, 2001 1. A small pin contains 0.0178 mol of iron. How many atoms of iron are in the pin? 2. A sample
Chapter 2: The Chemical Context of Life
Chapter 2: The Chemical Context of Life Name Period This chapter covers the basics that you may have learned in your chemistry class. Whether your teacher goes over this chapter, or assigns it for you
Type of Chemical Bonds
Type of Chemical Bonds Covalent bond Polar Covalent bond Ionic bond Hydrogen bond Metallic bond Van der Waals bonds. Covalent Bonds Covalent bond: bond in which one or more pairs of electrons are shared
5. Which temperature is equal to +20 K? 1) 253ºC 2) 293ºC 3) 253 C 4) 293 C
1. The average kinetic energy of water molecules increases when 1) H 2 O(s) changes to H 2 O( ) at 0ºC 3) H 2 O( ) at 10ºC changes to H 2 O( ) at 20ºC 2) H 2 O( ) changes to H 2 O(s) at 0ºC 4) H 2 O( )
Questions Q1. Lithium, sodium and potassium are metals in group 1 of the periodic table. They are good conductors of heat and electricity. The freshly-cut metals are shiny. (a) (i) Give another physical
Work hard. Be nice. Name: Period: Date: UNIT 1: Introduction to Matter Lesson 4: A Fine Line Between Compounds and Mixtures
Name: Period: Date: UNIT 1: Introduction to Matter Lesson 4: A Fine Line Between Compounds and Mixtures Do Now: PRE-READING OPEN-NOTES QUIZ! By the end of today, you will have an answer to: How do pure
CHEMICAL DETERMINATION OF EVERYDAY HOUSEHOLD CHEMICALS
CHEMICAL DETERMINATION OF EVERYDAY HOUSEHOLD CHEMICALS Purpose: It is important for chemists to be able to determine the composition of unknown chemicals. This can often be done by way of chemical tests.
Chemical Formulas, Equations, and Reactions Test Pre-AP Write all answers on your answer document.
Name: Period: Chemical Formulas, Equations, and Reactions Test Pre-AP Write all answers on your answer document. 1. Which of the following is a NOT a physical property of hydrogen? A. It is gas C. It is
Chemistry Post-Enrolment Worksheet
Name: Chemistry Post-Enrolment Worksheet The purpose of this worksheet is to get you to recap some of the fundamental concepts that you studied at GCSE and introduce some of the concepts that will be part
Chemistry Diagnostic Questions
Chemistry Diagnostic Questions Answer these 40 multiple choice questions and then check your answers, located at the end of this document. If you correctly answered less than 25 questions, you need to
*0500/402* 0500/402. CHEMISTRY STANDARD GRADE Credit Level. Fill in these boxes and read what is printed below. Full name of centre
FOR OFFIIL USE 0500/402 NTIONL QULIFITIONS 2009 MONDY, MY 0.50 M 2.20 PM Total HEMISTRY STNDRD GRDE redit Level Fill in these boxes and read what is printed below. Full name of centre Town Forename(s)
Compounds vs mixtures. Physics and Chemistry IES Jaume Salvador i Pedrol February 2009
Compounds vs mixtures Physics and Chemistry IES Jaume Salvador i Pedrol February 2009 Compounds Remember that a compound is a substance made up from two or more elements, chemically joined together. This
GCSE. Chemistry A. Mark Scheme for January 2013. General Certificate of Secondary Education Unit A172/02: Modules C4, C5, C6 (Higher Tier)
GCSE Chemistry A General Certificate of Secondary Education Unit A172/02: Modules C4, C5, C6 (Higher Tier) Mark Scheme for January 2013 Oxford Cambridge and RSA Examinations OCR (Oxford Cambridge and RSA)
Prentice Hall. Chemistry (Wilbraham) 2008, National Student Edition - South Carolina Teacher s Edition. High School. High School
Prentice Hall Chemistry (Wilbraham) 2008, National Student Edition - South Carolina Teacher s Edition High School C O R R E L A T E D T O High School C-1.1 Apply established rules for significant digits,
Chapter 1: Moles and equations. Learning outcomes. you should be able to:
Chapter 1: Moles and equations 1 Learning outcomes you should be able to: define and use the terms: relative atomic mass, isotopic mass and formula mass based on the 12 C scale perform calculations, including
Polarity and Properties Lab PURPOSE: To investigate polar and non-polar molecules and the affect of polarity on molecular properties.
Name!!!! date Polarity and Properties Lab PURPOSE: To investigate polar and non-polar molecules and the affect of polarity on molecular properties. STATION 1: Oil and water do not mix. We all know that.
BOND TYPES: THE CLASSIFICATION OF SUBSTANCES
BOND TYPES: THE CLASSIFICATION OF SUBSTANCES Every (pure) substance has a unique set of intrinsic properties which distinguishes it from all other substances. What inferences, if any can be made from a
Chemistry: Chemical Equations
Chemistry: Chemical Equations Write a balanced chemical equation for each word equation. Include the phase of each substance in the equation. Classify the reaction as synthesis, decomposition, single replacement,
ATOMS AND BONDS. Bonds
ATOMS AND BONDS Atoms of elements are the simplest units of organization in the natural world. Atoms consist of protons (positive charge), neutrons (neutral charge) and electrons (negative charge). The
C4 Revision Questions Bumper Pack
C4 Revision Questions Bumper Pack You will need a Periodic Table to answer these questions!! C4a Atomic structure 1. Write down a definition of an element. 2. Write down: a) the approximate radius of an
The melting temperature of carbon
hemical misconceptions 71 The melting temperature of carbon Target level Topics Rationale This exercise is suitable for either 14 16 year olds who have studied bonding and structure and can calculate relative
W1 WORKSHOP ON STOICHIOMETRY
INTRODUCTION W1 WORKSHOP ON STOICHIOMETRY These notes and exercises are designed to introduce you to the basic concepts required to understand a chemical formula or equation. Relative atomic masses of
Science 20. Unit A: Chemical Change. Assignment Booklet A1
Science 20 Unit A: Chemical Change Assignment Booklet A FOR TEACHER S USE ONLY Summary Teacher s Comments Chapter Assignment Total Possible Marks 79 Your Mark Science 20 Unit A: Chemical Change Assignment
EDEXCEL INTERNATIONAL GCSE CHEMISTRY EDEXCEL CERTIFICATE IN CHEMISTRY ANSWERS SECTION C
EDEXCEL INTERNATIONAL GCSE CHEMISTRY EDEXCEL CERTIFICATE IN CHEMISTRY ANSWERS SECTION C Chapter 16 1. Burn sulfur in air to give sulfur dioxide. S(s) + O 2 (g) ----> SO 2 (g) Pass this with more air over
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
Chemistry 52. Reacts with active metals to produce hydrogen gas. Have a slippery, soapy feeling. React with carbonates to produce CO 2
ACID AND BASE STRENGTH Experiment #2 PURPOSE: 1. To distinguish between acids, bases and neutral substances, by observing their effect on some common indicators. 2. To distinguish between strong and weak
Desalination of Sea Water E7-1
Experiment 7 Desalination of Sea Water E7-1 E7-2 The Task The goal of this experiment is to investigate the nature and some properties of sea water. Skills At the end of the laboratory session you should
In the box below, draw the Lewis electron-dot structure for the compound formed from magnesium and oxygen. [Include any charges or partial charges.
Name: 1) Which molecule is nonpolar and has a symmetrical shape? A) NH3 B) H2O C) HCl D) CH4 7222-1 - Page 1 2) When ammonium chloride crystals are dissolved in water, the temperature of the water decreases.
Chapter 17. How are acids different from bases? Acid Physical properties. Base. Explaining the difference in properties of acids and bases
Chapter 17 Acids and Bases How are acids different from bases? Acid Physical properties Base Physical properties Tastes sour Tastes bitter Feels slippery or slimy Chemical properties Chemical properties
hij GCSE Science / Chemistry Higher Tier Unit 1 Chemistry SPECIMEN MARK SCHEME Version 1.0
hij GCSE Science / Chemistry Higher Tier Unit Chemistry SPECIMEN MARK SCHEME Version.0 Copyright 20 AQA and its licensors. All rights reserved. The Assessment and Qualifications Alliance (AQA) is a company
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
ATOMS. Multiple Choice Questions
Chapter 3 ATOMS AND MOLECULES Multiple Choice Questions 1. Which of the following correctly represents 360 g of water? (i) 2 moles of H 2 0 (ii) 20 moles of water (iii) 6.022 10 23 molecules of water (iv)
Chemistry B11 Chapter 4 Chemical reactions
Chemistry B11 Chapter 4 Chemical reactions Chemical reactions are classified into five groups: A + B AB Synthesis reactions (Combination) H + O H O AB A + B Decomposition reactions (Analysis) NaCl Na +Cl
Chemistry Ch 15 (Solutions) Study Guide Introduction
Chemistry Ch 15 (Solutions) Study Guide Introduction Name: Note: a word marked (?) is a vocabulary word you should know the meaning of. A homogeneous (?) mixture, or, is a mixture in which the individual
GCSE. Chemistry B. Mark Scheme for January 2013. General Certificate of Secondary Education. Unit B741/02: Modules C1, C2, C3 (Higher Tier)
GCSE Chemistry B General Certificate of Secondary Education Unit B741/02: Modules C1, C2, C3 (Higher Tier) Mark Scheme for January 2013 Oxford Cambridge and RSA Examinations OCR (Oxford Cambridge and RSA)