Explain why the two curves become horizontal after a given period of time. (1mark)
|
|
|
- Valentine Daniel
- 5 years ago
- Views:
Transcription
1 RATE OF REACTION (i) The graph below shows the amount of calcium carbonate and calcium chloride varying with time in the reaction: CaCO3 2HCl CaCl H O CO2 s aq 2 aq 2 L g 1. Which curve shows the amount of calcium chloride varying with time (1mark) (b) Explain why the two curves become horizontal after a given period of time. (1mark) (a) Sketch on the graph how curve II would appear if the experiment was repeated using a more dilute hydrochloric acid solution. (1mark) 2. A diagram of the apparatus which could be used to investigate the rate of reaction between magnesium and an excess of an acid is drawn below.
2 (a) The magnesium kept rising to the surface. In one experiment, this was prevented by twisting the magnesium around a piece of copper. In a second experiment, the magnesium was held down by a plastic net fastened to the beaker. (i) Suggest a reason why magnesium, which is denser than water, foated to the surface (ii) Iron, zinc and copper have similar densities. Why was copper a better choice than iron or zinc to weigh down the magnesium? (b) The only difference in the two experiments was the method used to hold down the magnesium. The results are shown below.
3 (c) In which experiment did the magnesium react faster? (d) Suggest a reason why the experiment chosen in (i) had the faster rate. (c) The experiment was repeated using 1.0 mol / dm3 propanoic acid instead of 1.0 mol / dm3 hydrochloric acid. Propanoic acid is a weak acid. (i) How would the graph for propanoic acid differ from the graph for hydrochloric acid? (ii) How would the graph for propanoic acid be the same as the graph for hydrochloric acid? (d) Give two factors which would alter the rate of this reaction. For each factor explain why it alters the rate. Factor... Explanation Factor... Explanation...
4 ... [4] [Total: 10] 3. (a) The diagram below shows a set up used by a student in an attempt to prepare and collect oxygen gas. a) Complete the diagram by correcting the mistakes on it. (2mks) b) Name the catalyst used. ().. c) Write the equation for the production of oxygen gas. ().. (b) A piece of phosphorus was burnt in excess air. The product obtained was shaken with a small amount of hot water to make it a solution. b) Write an equation for the burning of phosphorus in air. ().. c) The solution obtained in (b) above was found to have a Ph of 2. Give reasons for this observation. ().. (c) Sketch graph on the grid given below showing how the volume of oxygen (vertical axis) varies with time when:- (i) 0.5g of the catalyst is mixed with 100cm 3 of 0.2Mhydrogn peroxide solution at 20 0 C, label the curve R. ()
5 (ii) The same experiment is repeated at 30 0 C, label the curve S. () (iii) The same experiment is repeated at 40 0 C, label the curve T. () 4. The reaction between 0.65g of zinc granules and excess of 0.5M hydrochloric acid was followed by measuring the amount of gas produced. The following results were obtained Time (sec) Total volume of gas at r.t.p (cm 3 ) a) Plot a graph of volume of gas produced against time.
6 4mks b) (i) Write an equation for the reaction taking place. (ii) How would the gas produced be identifed? (iii) Why is an excess of an acid used?
7 c) From the graph: i) What is the volume of the gas evolved at 75 seconds? ii) At what time is the reaction complete? (a) On the same graph, sketch the curves that you expect if the experiment was repeated under the same conditions but using: (i) 0.4M hydrochloric acid, instead of 0.5M hydrochloric acid. Label the graph X. (ii) Zinc powder (same quantity) was used in place of granulated zinc. Label the graph Y. (b) Calculate the volume of the gas that would be produced at r.t.p from 13g of zinc. (Zn = 65.0, molar gas volume at r.t.p. = 24.0dm 3 )
REACTION RATES AND REVERSIBLE REACTIONS
NAME SCHOOL INDEX NUMBER DATE REACTION RATES AND REVERSIBLE REACTIONS 1. 1989 Q 4 P1 The graph shows the loss in total mass of a mixture of marble chips and dilute hydrochloric acid with time at 250C Loss
Page 2. Q1.Marble chips are mainly calcium carbonate (CaCO 3 ).
Q1.Marble chips are mainly calcium carbonate (CaCO 3 ). A student investigated the rate of reaction between marble chips and hydrochloric acid (HCl). Figure 1 shows the apparatus the student used. Figure
Q1. A student investigated the rate of reaction between marble and hydrochloric acid.
Q. A student investigated the rate of reaction between marble and hydrochloric acid. The student used an excess of marble. The reaction can be represented by this equation. CaCO 3 (s) + 2HC (aq) CaC 2
A student adds the following volumes of aqueous sodium thiosulfate, dilute hydrochloric acid and distilled water to the conical flask.
1 When aqueous sodium thiosulfate and dilute hydrochloric acid are mixed, a precipitate of insoluble sulfur is produced. This makes the mixture difficult to see through. Na 2 S 2 O 3 (aq) + 2HCl (aq) S(s)
NCEA COLLATED QUESTIONS ON RATES OF REACTION
NCEA COLLATED QUESTIONS ON RATES OF REACTION Previously part of expired AS 90301, now part of 91166, Demonstrate understanding of chemical reactivity 2012 (91166 exam) When dilute hydrochloric acid, HCl(aq),
Cambridge International Examinations Cambridge Ordinary Level
Cambridge International Examinations Cambridge Ordinary Level *9280327505* CHEMISTRY 5070/42 Paper 4 Alternative to Practical May/June 2015 1 hour Candidates answer on the Question Paper. No Additional
concentration in mol / dm
1 Fatimah investigates the reaction between sodium hydrogencarbonate and dilute hydrochloric acid. She always adds 0.5 g of sodium hydrogencarbonate to 20 cm 3 of dilute hydrochloric acid. She measures
Figure 1. Oxygen. (g) +... (g)... SO 3. The pressure of the reacting gases was increased.
Q1. Figure 1 represents a reaction in the production of sulfuric acid. Figure 1 Oxygen Sulfur dioxide Sulfur trioxide (a) Complete and balance the equation for the reaction.... SO 2 (g) +... (g)... SO
Q1. The chart shows the processes involved in the manufacture of nitric acid from ammonia.
Q1. The chart shows the processes involved in the manufacture of nitric acid from ammonia. (a) Complete the word equation for the reaction that takes place in the first reaction vessel. ammonia +... nitrogen
HKCEE Past Paper Questions: Part 9 Rate of Reactions Part A: Multiple Choices
HKCEE Past Paper Questions: Part 9 Rate of Reactions Part A: Multiple Choices 1. HKCEE 1996 II Q11 In an experiment, 1.6 g of sulphur are burnt completely in air to form sulphur dioxide. What volume of
Manufature and Uses(Sulfur)
Manufature and Uses(Sulfur) Question Paper Level Subject Exam Board Topic Sub-Topic Paper Type Booklet IGCSE Chemistry CIE Sulfur Manufacture and uses (Includes Sulfur dioxide questions) Alternative to
O(s) CuSO 4. (a) Draw an arrow on the diagram to show where heat is applied. ...
1 The apparatus in the diagram is used to heat a sample of hydrated copper(ii) sulfate crystals, CuSO 4.5H 2 O The equation for the reaction that takes place is hydrated copper(ll) sulfate CuSO 4.5H 2
IGCSE (9-1) Edexcel - Chemistry
IGCSE (9-1) Edexcel - Chemistry Principles of Chemistry Chemical Formulae, Equations and Calculations NOTES 1.25: Write word equations and balanced chemical equations (including state symbols): For reactions
(i) State the time taken for all the peroxodisulfate ions to react. [1] (ii) Suggest a method of measuring the rate of this reaction.
![(i) State the time taken for all the peroxodisulfate ions to react. [1] (ii) Suggest a method of measuring the rate of this reaction.](/thumbs/87/95861182.jpg "(i) State the time taken for all the peroxodisulfate ions to react. [1] (ii) Suggest a method of measuring the rate of this reaction.")
9 (i) State the time taken for all the peroxodisulfate ions to react. [1].............................. minutes (ii) Suggest a method of measuring the rate of this reaction. [1]............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................
A student investigated three glow sticks. One was placed in water at 5 C, one in water at 40 C and one in water at 70 C.
1 The picture shows three glowsticks. Photograph supplied by istockphoto/thinktsock Glow sticks contain several chemicals. When a glow stick is bent the chemicals mix. A chemical reaction takes place which
Kenya Certificate of Secondary Education (K.C.S.E.)
Name: School:. Date:... 233/1 CHEMISTRY PAPER 1 JULY /AUGUST 2011 TIME: 2 HOURS Index No. Candidate s Sign.... Kenya Certificate of Secondary Education (K.C.S.E.) Chemistry Paper 1 INSTRUCTIONS TO THE
Rates of Reaction. Question Paper. Save My Exams! The Home of Revision. Exam Board. Page 1. Score: /249. Percentage: /100
Rates of Reaction Question Paper Level Subject Exam Board Unit Topic Difficulty Level Booklet GCSE Chemistry AQA C2 Rates of Reaction Silver Level Question Paper Time Allowed: 249 minutes Score: /249 Percentage:
Unit 1 SOME BASIC CONCEPTS OF CHEMISTRY I. Multiple Choice Questions (Type-I) 1. Two students performed the same experiment separately and each one of them recorded two readings of mass which are given
10.03 Reaction Rates. 2Mg(s) + O2 (g) 2MgO(s).
10.03 Reaction Rates 1. What is required for a chemical reaction to occur? A) standard temperature and pressure B) a catalyst added to the reaction system C) effective collisions between reactant particles
Name: Rate of reaction. Class: Higher revision questions. Date: 57 minutes. Time: 56 marks. Marks: Comments: Page 1 of 24
Rate of reaction Higher revision questions Name: Class: Date: Time: 57 minutes Marks: 56 marks Comments: Page of 24 A student investigated the rate of the reaction between magnesium and dilute hydrochloric
Cambridge International Examinations Cambridge Ordinary Level
Cambridge International Examinations Cambridge Ordinary Level *0134775130* CHEMISTRY 5070/41 Paper 4 Alternative to Practical October/November 2016 1 hour Candidates answer on the Question Paper. No Additional
Kinetics & Equilibrium Review Packet. Standard Level. 1. Which quantities in the enthalpy level diagram are altered by the use of a catalyst?
Kinetics & Equilibrium Review Packet Standard Level 1. Which quantities in the enthalpy level diagram are altered by the use of a catalyst? Enthalpy I II III Time A. I and II only B. I and III only C.
MARAKWET WEST DISTRICT 233/1 CHEMISTRY PAPER 1 JULY/AUGUST 2015 TIME: 2 HOURS
MARAKWET WEST DISTRICT 233/1 CHEMISTRY PAPER 1 JULY/AUGUST 2015 TIME: 2 HOURS 1. State two reasons why we use the non- luminous flame for heating in the laboratory instead of using luminous flame. 2. The
for free past papers visit
NAME SCHOOL ------------------------------- INDEX NO. ----------------------------- SIGNATURE -------------------------- DATE ---------------------------------- 233/2 CHEMISTRYPAPER 2 (Theory) TIME: 2
Answer ALL questions.
Answer ALL questions. 01. The three states of matter are solid, liquid and gas. The diagram shows how the particles are arranged in each of these states. (a) Use words from the box to show the changes
The student s results are shown in the table below. Time / minutes Time / minutes
Q1.(a) Anhydrous calcium chloride is not used as a commercial de-icer because it reacts with water. The reaction with water is exothermic and causes handling problems. A student weighed out 1.00 g of anhydrous
Lesmahagow High School
Lesmahagow High School Higher Chemistry Controlling the Rate - Tutorial Questions Rates of Reaction Tutorial Questions 1 1. The graph shows the variation of concentration of a reactant with time as a reaction
No Brain Too Small. Credits: Four
No Brain Too Small Level 1 Science 2015 90944 Demonstrate understanding of aspects of acids and bases Credits: Four Achievement Achievement with Merit Achievement with Excellence Demonstrate understanding
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level
www.xtremepapers.com UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level *0160609008* CHEMISTRY 5070/43 Paper 4 Alternative to Practical May/June 2010 1 hour
MOI HIGH SCHOOL - KABARAK
Name:.. Class:. Adm.No.. School: Index No... Sign :.. 233/2 CHEMISTRY Paper 2 JUNE/JULY 2017 Time: 2 hours INSTRUCTIONS TO CANDIDATES MOI HIGH SCHOOL - KABARAK Kenya Certificate to Secondary Education
KENYA NATIONAL EXAMINATION COUNCIL REVISION MOCK EXAMS 2016 TOP NATIONAL SCHOOLS KAPSABET BOYS CHEMISTRY PAPER 1 TIME: 2 HOURS
KENYA NATIONAL EXAMINATION COUNCIL REVISION MOCK EXAMS 2016 TOP NATIONAL SCHOOLS KAPSABET BOYS CHEMISTRY PAPER 1 TIME: 2 HOURS SCHOOLS NET KENYA Osiligi House, Opposite KCB, Ground Floor Off Magadi Road,
SIC CONCEPTS TS OF CHEMISTRY. Unit. I. Multiple Choice Questions (Type-I)
Unit 1 SOME BASIC B SIC CONCEPTS CONCEP TS OF CHEMISTRY CHEMIS I. Multiple Choice Questions (Type-I) 1. Two students performed the same experiment separately and each one of them recorded two readings
C6 Quick Revision Questions
C6 Quick Revision Questions H = Higher tier only All questions apply for combined and separate science Question 1... of 50 List 3 ways the time of a reaction can be measured. Answer 1... of 50 Loss of
Phosphoric acid is made by reacting phosphate rock with sulfuric acid. Only three of the methods shown below will increase the rate of this reaction.
Q. The picture shows a lump of phosphate rock. Rob Lavinsky, irocks.com CC-BY-SA-3.0 [CC-BY-SA-3.0], via Wikimedia Commons Phosphoric acid is made by reacting phosphate rock with sulfuric acid. Only three
Q1.A student investigated the rate of reaction between sodium thiosulfate solution and dilute hydrochloric acid, as shown in Figure 1.
Q1.A student investigated the rate of reaction between sodium thiosulfate solution and dilute hydrochloric acid, as shown in Figure 1. The reaction produced a precipitate, which made the mixture turn cloudy.
1. The reaction between solid barium hydroxide and solid ammonium chloride can be represented by the equation below.
1. The reaction between solid barium hydroxide and solid ammonium chloride can be represented by the equation below. Ba(OH) 2 (s) + 2NH 4 Cl(s) BaCl 2 (s) + 2NH 3 (g) + 2H 2 O(l) ΔH ο = +51.1 kj mol 1
NAME INDEX NUMBER CANDIDATE SIGNATURE DATE.. 233/1/ CHEMISTRY PAPER 1 (THEORY) JULY/AUGUST HOURS
NAME INDEX NUMBER CANDIDATE SIGNATURE DATE.. 233/1/ CHEMISTRY PAPER 1 (THEORY) JULY/AUGUST 2018 2 HOURS INSTRUCTIONS TO CANDIDATES. (a) Write your name and index number in the spaces provided above. (b)
2. Relative molecular mass, M r - The relative molecular mass of a molecule is the average mass of the one molecule when compared with
Chapter 3: Chemical Formulae and Equations 1. Relative atomic mass, A r - The relative atomic mass of an element is the average mass of one atom of an element when compared with mass of an atom of carbon-12
Calcium carbonate reacts with dilute hydrochloric acid to produce the gas carbon dioxide
RATES OF REACTION High Demand Questions QUESTIONSHEET 1 Calcium carbonate reacts with dilute hydrochloric acid to produce the gas carbon dioxide. The table below gives the results from a reaction when
Quantitative Chemistry. AQA Chemistry topic 3
Quantitative Chemistry AQA Chemistry topic 3 3.1 Conservation of Mass and Balanced Equations Chemical Reactions A chemical reaction is when atoms are basically rearranged into something different. For
Q1. The gas-phase reaction between hydrogen and chlorine is very slow at room temperature. (g) + Cl 2. (g) 2HCl(g) (2)
Q1. The gas-phase reaction between hydrogen and chlorine is very slow at room temperature. H 2 (g) + Cl 2 (g) 2HCl(g) (a) Define the term activation energy....... Give one reason why the reaction between
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level *4711189762* CEMISTRY 5070/41 Paper 4 Alternative to Practical October/November 2013 1 hour Candidates
NCERT Solutions for Atoms and Molecules
1 NCERT Solutions for Atoms and Molecules Question 1. In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium
3. Which postulate of Dalton s atomic theory is the result of the law of conservation of mass?
1 1. In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of sodium ethanoate. Show that these observations are in
In an investigation of the rate of reaction between hydrochloric acid and pure magnesium, a student obtained the following curve.
Q1.(a) In an investigation of the rate of reaction between hydrochloric acid and pure magnesium, a student obtained the following curve. The reaction of magnesium with dilute hydrochloric acid is exothermic.
Set 4 Marking Scheme: Acid Bases & Salts 2010
Set 4 Marking Scheme: Acid Bases & Salts 00 ACID AND BASES PAPER : STRUCTURE (a) Neutralisation KOH + H SO 4 K SO 4 + H O Correct formulae of reactants and products Balanced equation i. H +, OH -, K +
Answer all the questions.
Answer all the questions.. A student investigates the reaction between sodium thiosulfate and hydrochloric acid. Look at the diagram below. It shows the apparatus he uses. After a time he cannot see the
Name: Rate of reaction. Class: Foundation revision questions. Date: 47 minutes. Time: 46 marks. Marks: Comments: Page 1 of 21
Rate of reaction Foundation revision questions Name: Class: Date: Time: 47 minutes Marks: 46 marks Comments: Page of 2 (a) The figure below represents the reaction of sulfur dioxide with oxygen. Oxygen
Excellence International School Chemistry Academic Year Grade 9 Revision sheet 3 Topic: unit 8 speed of reaction
Unit 9 : 9.1&9.2 Name:... Class:.. Date: Paper 2 Excellence International School Chemistry Academic Year 2016-2017 Grade 9 Revision sheet 3 Topic: unit 8 speed of reaction 1 st term 1. A student was investigating
F321: Atoms, Bonds and Groups Redox
F321: Atoms, Bonds and Groups Redox 39 Marks 1. The element strontium forms a nitrate, Sr(NO 3 ) 2, which decomposes on heating as shown below. 2Sr(NO 3 ) 2 (s) 2SrO(s) + 4NO 2 (g) + O 2 (g) Using oxidation
Set 1 Structure of the atoms & Chemical Equation Perfect Score F Matter is anything that. and has.
STRUCTURE OF THE ATOMS 1. Matter is anything that. and has. 2. The particle theory of matter state that matter is.. 3. Type of particle Example 4. Property Solid Liquid Gas Diagrammatic representation
KENYA NATIONAL EXAMINATION COUNCIL REVISION MOCK EXAMS 2016 TOP NATIONAL SCHOOLS NAIROBI SCHOOL CHEMISTRY PAPER 2 TIME: 2 HOURS
KENYA NATIONAL EXAMINATION COUNCIL REVISION MOCK EXAMS 2016 TOP NATIONAL SCHOOLS NAIROBI SCHOOL CHEMISTRY PAPER 2 TIME: 2 HOURS SCHOOLS NET KENYA Osiligi House, Opposite KCB, Ground Floor Off Magadi Road,
(04) WMP/Jan11/CHEM2
Kinetics 4 2 The diagram below shows a Maxwell Boltzmann distribution for a sample of gas at a fixed temperature. E a is the activation energy for the decomposition of this gas. Number of molecules with
Paper Reference (complete below)
Centre No. Paper Reference (complete below) Surname Initial(s) Candidate No. Signature Paper Reference(s) 4335/03 4437/08 London Examinations IGCSE Chemistry 4335 Paper 3 Science (Double Award) 4437 Paper
GraspIT AQA GCSE Quantitative changes
A. Chemical measurements part 1 Chemical changes and conservation of mass 1. A piece of magnesium was heated in a crucible. a) Write a balance equation to show how the magnesium reacts with oxygen. (2)
N Goalby chemrevise.org
4.6 Rate and Extent of Chemical Change Rates of Reaction The rate of a chemical reaction can be found by measuring the amount of a reactant used or the amount of product formed over time: Rate of reaction
ST. FRANCIS SECONDARY SCHOOL HALF YEARLY EXAMINATION SPECIMEN PAPER FORM 4 CHEMISTRY TIME: 2 HOURS. Name: Total Mark from 90:
ST. FRANCIS SECONDARY SCHOOL HALF YEARLY EXAMINATION SPECIMEN PAPER FORM 4 CHEMISTRY TIME: 2 HOURS Name: Total Mark from 90: A copy of the periodic table is provided during the exam. You are reminded of
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY 5070/04
www.xtremepapers.com Centre Number Candidate Number Name UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level CHEMISTRY 5070/04 Paper 4 Alternative to Practical
SIR MICHELANGELO REFALO SIXTH FORM Half-Yearly Exam 2016
SIR MICHELANGELO REFALO SIXTH FORM Half-Yearly Exam 2016 Subject: Chemistry Intermediate 1 st Year Time: 2Hrs Name: Useful information: 1 mole of gas occupies 22.4dm 3 at S.T.P Avogadro s constant is 6x10
Page 2. Q1.Water dissociates slightly according to the equation: H 2 O(I) The ionic product of water, K w, is given by the expression
Q1.Water dissociates slightly according to the equation: H 2 O(I) H + (aq) + OH (aq) The ionic product of water, K w, is given by the expression K w = [H + ][OH ] K w varies with temperature as shown in
Chapter 5 Chemical Calculations
Calculating moles Moles and elements Moles and compounds Moles and gases Moles and solutions Calculating formulae Finding the formula Chapter 5 Chemical Calculations Moles and chemical equations Checklist
Class IX Chapter 3 Atoms and Molecules Science
Class IX Chapter 3 Atoms and Molecules Science Question 1: In a reaction, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid. The products were 2.2 g of carbon dioxide, 0.9 g water and 8.2 g of
NATIONAL 5 CHEMISTRY
Farr High School NATIONAL 5 CHEMISTRY Unit 1 Chemical Changes and Structure Question Booklet 1 Rates of Reaction 1. Explain how the following would affect the rate of the reaction between 1.0 g of magnesium
Rates. Specification points. Year 10 - Rates of Reaction
Rates Specification points Year 10 - Rates of Reaction Calculating rates of reactions The rate of a chemical reaction can be found by measuring the quantity of a reactant used or the quantity of product
(i) Calculate the relative formula mass of carbon dioxide, CO 2.. (Relative atomic masses: C = 12, O = 16) (1) CaCO 3.
1 (a) Calcium oxide is manufactured by heating calcium carbonate. The waste product of this process is carbon dioxide. (i) Calculate the relative formula mass of carbon dioxide, CO 2. (Relative atomic
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level
Cambridge International Examinations Cambridge International Advanced Subsidiary and Advanced Level www.xtremepapers.com CHEMISTRY 9701/05 Paper 5 Planning, Analysis and Evaluation For Examination from
The Atmosphere Exam questions
The Atmosphere Exam questions 2012 - Higher What substance is formed when carbon is burned in oxygen? Give the effect of this substance on moist litmus paper. The table gives the % by volume of five gases/
NECTA A-Level CHEMISTRY 2 May 2004
NECTA A-Level CHEMISTRY 2 May 2004 [04/2] SECTION A 1. (a) Draw a sketch of a cell formed by combining Zn 2+ (aq)/zn(s) and Cu 2+ (aq)/cu(s) half-cells. Indicate on the sketch the following: The positive
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level
UNIVERSITY OF AMBRIDGE INTERNATIONAL EXAMINATIONS General ertificate of Education Ordinary Level *4711189762* EMISTRY 5070/41 Paper 4 Alternative to Practical October/November 2013 1 hour andidates answer
1 Some Basic Concepts of Chemistry
1 Some Basic Concepts of Chemistry Multiple Choice Questions (MCQs) Q. 1 Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below.
1. Which of the following units could be used to express the reaction rate?
Chemistry 12 Kinetics Practice Test # 2 1. Which of the following units could be used to express the reaction rate? A. ml/s B. ml/g C. g/ml D. ml/mol 2. Consider the reaction: Zn (s) + 2HCl (aq) ZnCl 2(aq)
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level *1331047203* CHEMISTRY 5070/42 Paper 4 Alternative to Practical October/November 2011 1 hour Candidates
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY
Centre Number Candidate Number Name UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Subsidiary Level and Advanced Level CHEMISTRY 9701/05 Paper 5 Planning,
Cambridge International Examinations Cambridge Ordinary Level
Cambridge International Examinations Cambridge Ordinary Level *8246073252* CHEMISTRY 5070/41 Paper 4 Alternative to Practical May/June 2016 1 hour Candidates answer on the Question Paper. No Additional
London Examinations IGCSE
Centre No. Paper Reference (complete below) Surname Initial(s) Candidate No. Signature Paper Reference(s) 4335/03 4437/08 London Examinations IGCSE Chemistry 4335 Paper 3 Science (Double Award) 4437 Paper
Stoichiometry Part 1
Stoichiometry Part 1 Formulae of simple compounds Formulae of simple compounds can be deduced from their ions/valencies but there are some that you should know off by heart. You will learn these and more
Which two diagrams show suitable methods for investigating the rate (speed) of the reaction?
1 liquid X reacts with solid Y to form a gas. Which two diagrams show suitable methods for investigating the rate (speed) of the reaction? 1 2 cotton wool cotton wool X Y X Y balance 3 4 stopper stopper
Page 2. Q1.Carbon dioxide is produced when copper carbonate is heated.
Q1.Carbon dioxide is produced when copper carbonate is heated. A student investigated heating copper carbonate. The student used the apparatus to measure how long it took for carbon dioxide to be produced.
UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY
Centre Number Candidate Number Name UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY 06/06 Paper 6 Alternative to Practical Candidates
CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education
Centre Number Candidate Number Name CAMBRIDGE INTERNATIONAL EXAMINATIONS International General Certificate of Secondary Education CHEMISTRY 0620/06 Paper 6 Alternative to Practical Candidates answer on
Centre Number Candidate Number Candidate Name UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE General Certificate of Education Ordinary Level CHEMISTRY 5070/4 PAPER 4 Alternative to Practical MAY/JUNE
NATIONALEXAMINATIONS COUNCIL 233/1 CHEMISTRY
Name: Index No. School:. Candidate s Sign.... Date:... 233/1 CHEMISTRY PAPER 1 FORM IV PRE-MOCKS Time: 2 hours NATIONALEXAMINATIONS COUNCIL 233/1 CHEMISTRY FORM IV INSTRUCTIONS TO THE CANDIDATES:- Write
Draw one line from each solution to the ph value of the solution. Solution ph value of the solution
1 The ph scale is a measure of the acidity or alkalinity of a solution. (a) Draw one line from each solution to the ph value of the solution. Solution ph value of the solution 5 Acid 7 9 Neutral 11 13
2. In each of the following pairs of reactions, which would have the faster reaction rate?
CHEMISTRY 12 REACTION RATES WORKSHEET 1. The following data were collected for the reaction: Zn (s) + 2HCl (aq) H 2(g) + ZnCl 2(aq) in which zinc metal was reacted with 0.200 M HCl (aq) : Time (seconds)
Cambridge International Examinations Cambridge International General Certifi cate of Secondary Education
www.xtremepapers.com Cambridge International Examinations Cambridge International General Certifi cate of Secondary Education *326217* CHEMISTRY 0620/63 Paper 6 Alternative to Practical October/November
TOPIC 4: THE MOLE CONCEPTS
TOPIC 4: THE MOLE CONCEPTS INTRODUCTION The mass is gram (g) of 1 mole of substances is called its.. 1 mole of substances has.. particles of a substances The mass of 1 mole of substances is always equal
Rate (speed) of reaction
Rate (speed) of reaction Question Paper 1 Level IGSE Subject hemistry (62/971) Exam oard ambridge International Examinations (IE) Topic hemical reactions Sub-Topic Rate (speed) of reaction ooklet Question
1. Which of the following units could be used to express the reaction rate?
Chemistry 12 Kinetics Practice Test # 2 1. Which of the following units could be used to express the reaction rate? A. ml/s B. ml/g C. g/ml D. ml/mol 2. Consider the reaction: Zn (s) + 2HCl (aq) ZnCl 2(aq)
A-LEVEL TRANSITION COURSE SUMMER 2018 PART 2: USING CHEMICAL EQUATIONS
A-LEVEL TRANSITION COURSE SUMMER 2018 PART 2: USING CHEMICAL EQUATIONS MASS AQUEOUS VOLUME ` MOLAR MASS GASEOUS VOLUME MOLES CONCENTRATION REVISION FROM LESSON 1 How many moles? 1) Jahin weighs a sample
BUSIA SUB-COUNTY JET 2016
Name Index No.. School... 233/1 CHEMISTRY THEORY Paper 1 Time: 2 Hours BUSIA SUB-COUNTY JET 2016 Kenya Certificate of Secondary Education (K.C.S.E) INSTRUCTIONS TO CANDIDATES. Answer all the questions
1. A. Define the term rate of reaction. The measure of the amount of reactants being converted into products per unit amount of time
Name answer key period IB topic 6 Kinetics 1. A. Define the term rate of reaction. The measure of the amount of reactants being converted into products per unit amount of time b. the reaction between C
Kenya Certificate of Secondary Education (K.C.S.E.)
Name: Index No. School:. Candidate s Sign.... Date:... 233/1 CHEMISTRY PAPER 1 JULY /AUGUST 2011 TIME: 2 HOURS Kenya Certificate of Secondary Education (K.C.S.E.) Chemistry Paper 1 INSTRUCTIONS TO THE
Paper Reference. Sample Assessment Material Time: 2 hours
Centre No. Candidate No. Paper Reference(s) 4CH0/1C Edexcel IGCSE Chemistry Chemistry Paper 1 Sample Assessment Material Time: 2 hours Materials required for examination Nil Items included with question
Enthalpy 2. Table 1. Initial temperature of the water / C Final temperature of the water / C 45.4
Enthalpy 2 1. The alcohol 2-methylpropan-2-ol, (CH 3) 3COH, reacts to form esters that are used as flavourings by the food industry. The alcohol can be oxidised to produce carbon dioxide and water. A student
(g) + 3H 2. (g) 2NH 3. (g) (a) Explain what is meant by a dynamic equilibrium. (2)
1 When nitrogen and hydrogen react to form ammonia, the reaction can reach a dynamic equilibrium. (g) + 3H 2 (g) 2NH 3 (g) (a) Explain what is meant by a dynamic equilibrium. (b) In industry, the reaction
Calcium hydroxide, slaked lime, is made from calcium oxide.
1 Quicklime, which is calcium oxide, is made by heating limestone in a furnace. CaCO 3 (s) CaO(s) + CO 2 (g) The reaction does not come to equilibrium. (a) Suggest why the conversion to calcium oxide is
Page 2. Q1.A student investigated food dyes using paper chromatography. This is the method used.
Q1.A student investigated food dyes using paper chromatography. This is the method used. 1. Put a spot of food colouring X on the start line. 2. Put spots of four separate dyes, A, B, C and D, on the start
burette filled with sulphuric acid conical flask 25.0 cm 3 of sodium hydroxide(aq) concentration 2.24 mol / dm 3
1 Crystals of sodium sulphate-10-water, Na 2 SO 4.10H 2 O, are prepared by titration. burette filled with sulphuric acid conical flask 25.0 cm 3 of sodium hydroxide(aq) concentration 2.24 mol / dm 3 (a)
, for C 2. COOH is mol dm [1] COOH by adding water until the total volume is cm 3. for C 2 COOH.
![, for C 2. COOH is mol dm [1] COOH by adding water until the total volume is cm 3. for C 2 COOH.](/thumbs/74/70636476.jpg ", for C 2. COOH is mol dm [1] COOH by adding water until the total volume is cm 3. for C 2 COOH.")
1 A student is supplied with 0.500 mol dm 3 potassium hydroxide, KOH, and 0.480 mol dm 3 propanoic acid, C 2 COOH. The acid dissociation constant, K a, for C 2 COOH is 1.35 10 5 mol dm 3. (a) C 2 COOH
London Examinations IGCSE
Centre No. Candidate No. Paper Reference 4 3 3 5 2 H Paper Reference(s) 4335/2H London Examinations IGCSE Chemistry Paper 2H Higher Tier Wednesday 21 May 2008 Afternoon Time: 2 hours Surname Signature