Rates of reaction exam questions gcse pdf. Mean (average) rate of a reaction can be calculated from supplied data or from graphs - the steeper the gradient on the graph, the faster the rate of reaction . GCSE CHEMISTRY RATES OF REACTION ANSWERS AND MARK SCHEMES . The reaction is exothermic. = Q2: Give two ways, whereby the quantity of reactant or product can be measured. Q1: equations to show how the rate of a chemical reaction can be found. A student investigated the rate of reaction between sodium thiosulfate solution and dilute hydrochloric acid, as shown in Figure 1. Plotting a graph until the completion of the reaction shows how the rate changes with time; Over time the rate of reaction slows as the reactants are being used up so the line becomes less steep and eventually becomes horizontal, indicating the reaction has finished AQA GCSE Chemistry Topic Questions Past paper and exam-style questions organised by topic, with student-friendly answers written by teachers and examiners. The rate of a chemical reaction is heavily influenced by a number of factors. the mass of each substance does not change. The apparatus shown in the diagram was used to investigate the rate of reaction of excess marble chips with dilute hydrochloric acid, HCl. Downloads. Catalysts are substances which speed up the rate of a reaction without themselves being altered or consumed in the reaction The mass of a catalyst at the beginning and end of a reaction is the same and they do not form part of the equation The set-up for measuring the reaction rate by mass loss A timer is started when the reactants are combined and the mass is recorded over time However, one limitation of this method is the gas must be sufficiently dense or the change in mass is too small to measure on a 2 or 3 decimal place balance Q1. The flow rate could be given as a compound measure such as depth per second or volume per minute. 0 g of marble chips were added to a flask containing 100 cm 3 of 2. 6 Rate + Extent Chemical Change 20. Nov 12, 2018 · (a) (i) This reaction takes place in industry at 1–2 atm pressure and can reach a dynamic equilibrium. Explain the effect on the rate of attainment of equilibrium, if the process is carried out at a pressure higher than 1–2 atm. uk/ Rates of reaction . 7 cm3/s Student B’s investigation had a faster rate of reaction. 6 Digestion. Rates of reaction - AQA; Sample exam questions - the rate and extent of chemical change - AQA; As a chemical reaction proceeds, the concentration of the reactants decreases and the concentration of the products increases; The rate of a reaction is the speed at which a chemical reaction takes place and has units mol dm-3 s-1; The rate of a reaction can be calculated by: Get ready for your exams with this BBC Bitesize GCSE Combined Science rates of reaction and energy changes (Edexcel) exam preparation guide. 20 g 1 . Compound X increases the rate of the reaction below. if a reaction makes 40 cm3 gas in 60 Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www. Reversible Reactions + Dynamic Equilibrium 1 These practice questions can be used by students and teachers and is suitable for GCSE AQA Chemistry topic Questions 8462 Level: GCSE AQA Chemistry 8462 Subject: Chemistry Exam board: GCSE AQA Topic: Reversible Reactions + Dynamic Equilibrium 1 When the rate of the forward reaction equals the rate of the reverse reaction, the overall reaction is said to be in a state of equilibrium. the faster the rate of reaction): higher concentration ---> faster rate of reaction Rate of reaction and time to finish Because rate of reaction increases as time taken to finish decreases, the rate of reaction can be represented as 1/time (one divided by time). com Past papers, summary notes and past exam questions by topic for AQA, CIE, Edexcel, OCR and WJEC Chemistry A-levels, International A-levels, GCSEs and IGCSEs Rate graphs until completion. Exam Board GCSE(9-1) Topic Rates of Reaction & Energy Changes Sub Topic Rates of Reaction Booklet Question Paper 2 Time Allowed: 26 minutes Score: /21 Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www. 7803. for reactants used up . Increasing the light intensity increases the rate of photosynthesis up to a point. 3 Rate of Reaction. Two substances, A and B, each form a colourless solution. (pdf) 295. Seneca covers foundation and higher tier across Double Award, Co-ordinated Sciences, Combined Sciences and your straight run-of-the-mill Chemistry. Question paper 1 . 2. Topic Learn about reversible chemical reactions and dynamic equilibrium with GCSE Bitesize Chemistry, AQA. 12 End of Topic Test Jul 14, 2020 · This resource will enable you to revise the section on Reaction rates that you did during term 2. the molecules on the left and right of the equation are changing into each other by chemical reactions constantly and at the same rate Aug 25, 2022 · A revision homework or class worksheet with answers that covers Rates of Reaction in C6 GCSE Chemistry. the molecules on the left and right of the equation are changing into each other by chemical reactions constantly and at the same rate Questions and model answers on 6. The equation for the reaction is: € (a) €€€€The energy level diagram for this reaction is given below. plotting all the points accurately 1 . The quizzes listed below are suitable for GCSE chemistry, IGCSE chemistry, O level chemistry, ~US grades 9 and 10 chemistry science courses or equivalent for pupils aged ~14 to 16 year old and any English speaking college students of school chemistry Index of Multiple Choice GCSE Science Required Practical Questions 1 AQA Required Practical Activities Practice Questions We have built these questions in a similar style to that presented within the exam boards sample assessment materials. Chemistry revision States of matter Elements, compounds and mixtures Atomic structure The periodic table Bonding and structure Quantitative chemistry Reactivity of metals Reactions of acids Electrolysis Exothermic and endothermic reactions Rate of reaction Equilibrium Crude oil Alkenes and alcohols Natural and synthetic polymers Purity, formulations and chromatography Identification of ions Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www. Level Jun 20, 2019 · Question Number Answer Acceptable answers Mark 1(a)(aoxidation(1) Question Number Answer Acceptable answers Mark 1(b)(i) An explanation linking the following points • large(r) surface area (1) • more frequent collisions with catalyst / reaction will go faster (1)OWTE large(r) {surface /area} more collisions (2) Question Number Get ready for your exams with this BBC Bitesize GCSE Combined Science rates of reaction and energy changes (Edexcel) exam preparation guide. Name gas A. an ADP molecule 2. savemyexams. GCSE; Edexcel; Rates of reaction - Edexcel Test questions. the molecules on the left and right of the equation are changing into each other by chemical reactions constantly and at the same rate Energy is given out in exothermic reactions The energy of the products will be lower than the energy of the reactants, so the change in energy is negative This is represented on the energy profile with a downwards arrow as the energy of the products is lower than the reactants. the rates of the forward reaction and reverse reaction are equal. 10 Examples of Digestive Enzymes - Lipase. Rate of reaction: The effect of concentration & pressure 5. 5 cm 3 /s. For more awesome GCSE and A level resources, visit us at www. The flask was placed on a balance and the mass was measured at the start of the reaction. 0 mol/dm 3 hydrochloric acid. Looking for Edexcel GCSE Chemistry Past Papers to help you prepare for your upcoming exam? Check out our selection of past papers from previous years and sample papers created by Edexcel. (2 marks) Q9: How do catalysts change reactions in this way? A= Provide a different pathway (1 mark) with a lower activation energy (1 mark). Chemical equations for reversible reactions. Mark Scheme 2. QUESTIONSHEET 1 (i) scales 1 . The salt formed is calcium chloride, CaCl 2. The reaction is summarised in the diagram below. Catalyst B is iron, which is used to speed up the reaction / increase the rate of reaction. The concentration of the hydrogen peroxide decreases during the reaction (e) Another student investigated the rate of a different reaction. Jun 20, 2019 · Save My Exams! – The Home of Revision. Lessons include: 1. \text{Flow rate}=\frac{\text{change in volume}}{\text{time taken}} It is important in GCSE mathematics questions to look at the unit of time being used and whether the question is referring to a volume of fluid. The rate of a reaction can usually be controlled by changing the temperature but cells of the body will get damaged if the temperature is raised too high. Questions Q1. Diagram showing the apparatus needed to investigate the effect of temperature on the rate of reaction. . This resource is targeted at teachers who can encourage pupils to use these questions as they are or even turn them into cue cards which have been proven as an It may be that one method of forming a product has a very high atom economy and relatively cheap conditions but an impractically slow rate of reaction. 7 Bile. The reaction produced a precipitate, which made the mixture turn cloudy. Rate of Reactions 1 These practice questions can be used by students and teachers and is suitable for GCSE AQA Chemistry topic Questions 8462 Level: GCSE AQA Chemistry 8462 Subject: Chemistry Exam board: GCSE AQA Topic: Rate of Reactions 1 (a) Complete and balance the equation for the reaction. (3) Rate calculations are important in determining how fast an enzyme is working (i. 651 KB whilst always focusing on what students need to be able to answer exam Ammonia is produced during the Haber Process. Quiz 3; D) Calculating Rate of Reaction from Graphs. b) Decreases the speed of a. Mark schemes. Calculate the energy change for the reaction and deduce whether it is exothermic or endothermic. The chief conditions that affect rate of reaction are; temperature, pressure, and concentration. Quiz 6; G) Dynamic Equilibriums ⬆️. The rate of the reaction between A and B can be investigated by placing the beaker GCSE; WJEC; Factors that affect the rate of reaction Test questions. (equation contains the symbol) ⇌ allow description of arrow / symbol. a lipid molecule C. If the solutions are mixed in a beaker, A and B react to form a coloured product. Change = the change in the substance being measured E. Enzymes: Practice Questions #1 1. Jun 20, 2019 · energy so more successful collisions so faster reaction • the answer communicates ideas clearly and coherently uses a range of scientific terminology accurately Rates of Reaction Worksheets, Questions, and Revision for GCSE Combined Science and Chemistry. However, low temperature can also limit the rate of photosynthesis. Topics include Collision Theory, Particles, Factors that Affect Rate and Reaction Profiles/Energy Level Diagrams with a variety of questions and challenging calculations The graph on the right shows the effect of both temperature and light intensity on the rate of photosynthesis. Reactions must have practical rates to be useful in industry; a reaction with an atom economy and percentage yield of 100\% be useless if it took thousands years to happen. Quiz 5; F) Reversible Reactions. Practice multiple choice questions, see explanations for every answers, and track your progress. When during the course of reaction, the rate of the forward reaction equals the rate of the reverse reaction, then the overall reaction is said to be in a state of equilibrium; Equilibrium is dynamic i. o Units of rate of reaction may be given as g/s or cm 3 /s o You can also use quantity of reactants in terms of moles (instead of Revision notes on 4. the rate of reaction) To perform a rate calculation, use the following formula: rate = change ÷ time. Biology Last exams 2024. II curve drawn to the right of curve A 1 Nov 10, 2018 · These are a list of the possible questions that could be asked in the new 9-1 GCSE style exams for AQA Chemistry under the single topic of The Rate and Extent of Chemical Changes. Revision notes on 1. google. These are the practice rates of reaction questions for GCSE Chemistry. Draw on the same diagram, of a catalysed reaction. When the lines begin to level off, light intensity is no longer limiting. Fun and easy Rate of Reaction quizzes based on GCSE AQA Chemistry past papers. 2. e. 00 g and to finish at 70. Speed. an indicator D. Marble is calcium carbonate, formula CaCO 3. 5 cm3/s Student B Mean rate of reaction= quantity of product formed time taken = 17 cm3 10 s = 1. State the effect of increasing the pressure on the rate of reaction. 11 Testing for Biological Molecules. (i) The pressure of the reacting gases was increased. _____ SO 2 (g) + _____ (g) _____ SO 3 (g) (2) (b) The conditions can affect the rate of the reaction. Method: Dilute hydrochloric acid is heated to a set temperature using a water bath; Add the dilute hydrochloric acid into a conical flask; Add a strip of magnesium and start the How catalysts affects equilibrium. The equation below summarizes the process that produces the flashing light of a firefly. Calculating rates of reactions. Rates of reaction 2. uk Page 1 Rates of Reaction Question Paper Level GCSE Subject Chemistry Exam Board AQA Unit C2 Topic Rates of Reaction Difficulty Level Bronze Level Booklet Question Paper Time Allowed: 98 minutes Score: /98 Questions Mark Scheme Section 1: The Particulate Nature of Matter Diffusion, Brownian Motion, Solids/Liquids/Gases - ATP Here Section 2: Experimental Techniques Apr 24, 2024 · This bundle of resources contains 6 lessons which meet all learning outcomes within the 'Rates of Reaction’ unit for the NEW AQA Chemistry Specification. The rate of this reaction can be investigated by mixing the reactants and finding the time taken for a precipitate of sulfur to become visible. Equilibrium is dynamic i. Rates of ReactionQuestion downlod:https://drive. Revision notes on Calculating Rates of Reactions for the AQA GCSE Chemistry: Combined Science syllabus, written by the Chemistry experts at Save My Exams. 1. Explore quizzes and practice tests created by teachers and students or create one from your course material. UK GCSE/IGCSE level and ~US grade 9-10 level for ages ~14-16. g. Investigating the effect of temperature on the rate of reaction. Get the edge you need to succeed on your Edexcel GCSE Chemistry exam with our comprehensive These all have an impact on the rate of reaction which is dependent on the number of successful collisions per unit of time You've read 0 of your 10 free revision notes Unlock more, it's free! GCSE Exams GCSE Maths GCSE Photosynthesis Reaction Questions GCSE Official MME. eg. amount of reactant decreases (iii) any three of four from one strand: Rate of Reaction Chemistry Questions with Solutions. 1 Rate of Reaction for the AQA GCSE Chemistry: Combined Science syllabus, written by the Chemistry experts at Save My Exams. Rates Of Reaction Exam Questions Gcse Pdf [Most popular] 5884 kb/s. When the pressure of a reaction involving gases is decreased, equilibrium will shift to increase the pressure and the side of the reaction with more gas molecules is favoured. Exam Questions Mark Scheme Next GCSE Biology Topic Rate of Photosynthesis. B) Rate of Reaction. an enzyme B. Nov 10, 2023 · C8 Rates and Equilibrium (AQA 1-9 Combined Trilogy) New for the AQA GCSE 1-9 Combined Trilogy module ‘C8 Rates and Equilibrium'. the molecules on the left and right of the equation are changing into each other by chemical reactions constantly and at the same rate GCSE Science Questions Pack 4 Pearson Publishing 01223 350555 9 Unit 3 Rates of Reaction Some reactions occur very quickly, like the burning of petrol in air in an engine. When the rate of the forward reaction equals the rate of the reverse reaction, the overall reaction is said to be in a state of equilibrium. Chemical reaction rates increase or decrease according to factors including temperature, pressure and light. or. In this reaction there are 2 moles of gas on both sides of the equation. Q3: Name five factors which affect the rates of chemical reactions: (2 marks) (5 marks) Rate of Reaction MS- AQA Chemistry GCSE. I Rate of Reaction Question Paper 1 Level GCSE (9-1) Subject Combined Science: Trilogy - Chemistry Exam Board AQA Topic 5. 4 Calculating Rate of Reaction. uk/ Rates of Reaction. Units of rate of reaction may be given as g/s (change in mass divided by time) or cm3/s (change in volume divided by time) INTERPRETING GRAPHS . uk Page 1 Rates of Reaction Question Paper Level GCSE Subject Chemistry Exam Board AQA Unit C2 Topic Rates of Reaction Difficulty Level Silver Level Booklet Question Paper Time Allowed: 249 minutes Score: /249 The reaction finishes after 30 seconds. Q1: Catalyst is a substance, which _____ chemical reaction. Example 1. Two other important factors are the surface area of the reactants and the presence of a catalyst. Q1. Rate of reaction: The effect of catalysts 4. Explain your answer in terms of particles. Reversible reactions 3. Na 2 S 2 O 3 (aq) + 2HCl (aq) → 2NaCl (s) + H 2 O (l) + S (s) + SO 2 (g). increases. The student timed how long it took until she could no longer see the cross. Hydrogen and chlorine react to form hydrogen chloride gas: H 2 + Cl 2 2HCl. Compound X is most likely A. View PDF List 63 v1 4Y11 Cambridge IGCSE Chemistry– past and specimen paper questions and answers allow one mark ONLY for: . Other reactions can take a very long time, like the rusting of iron. 8 Examples of Digestive Enzymes - Amylase. Measuring the rate of a reaction Rates of reaction tell us how fast or slow a given reaction is. the mixture will have become a paler purple. The greater the frequency of successful collisions between reactant particles, the greater the reaction rate. There can be no guarantee of the extent to which these questions will reflect the actual examination questions students will sit. Table 3 shows the results from the different reaction. Which student’s investigation had a faster rate of reaction? 20 Student A: Mean rate of reaction = quantity of product formed time taken = 7. Therefore, living organisms use large proteins called enzymes to speed up reactions. decreases. 2 Factors Affecting Enzymes for the Edexcel GCSE Biology syllabus, written by the Biology experts at Save My Exams. 1 Photosynthetic Reaction for the AQA GCSE Biology syllabus, written by the Biology experts at Save My Exams. Quiz 4; E) Catalyst. co. If a graph of this is plotted against Revision notes on 7. drawing a smooth curve ignoring the 6 min point 1 (ii) I curve drawn to the left of curve A 1 . Changes in these factors directly influence the rate of a reaction; It is of economic interest to have a higher rate of reaction as this implies a higher rate of production and hence a more efficient and sustainable process Doc Brown's School Chemistry Quizzes and Worksheets. uk Page 1 Rates of Reaction Question Paper Level GCSE Subject Chemistry Exam Board AQA Unit C2 Topic Rates of Reaction Difficulty Level Gold Level Booklet Question Paper Time Allowed: 84 minutes Score: /84 This question is about the rate of reaction between sodium thiosulfate solution and dilute hydrochloric acid: Na 2 S 2 O 3 (aq) + 2HCl (aq) → 2NaCl (aq) + S (s) + SO 2 (g) + H 2 O (l) The reaction between these two substances produces a precipitate which makes the mixture turn cloudy. Q8: Below is a reaction profile. curve to start at 71. increases must be in this order. com/file/d/1WCxlWAXtb1cs58P1nzvXhzV6Cm_bjUu2/view?usp=sharingGCSE Chemistry Question walkthrough. a) Increases the speed of a. Use the results of these experiments to explain, in terms of the behaviour of particles, the effect of changing temperature and the effect of changing the concentration of A in solution on the rate of this reaction. Name catalyst B used and state why it is used; Answer: Gas A is hydrogen / H 2. The mean rate of reaction in the first 5 seconds is 2. Quiz 7 ⬆️; ⬆️ means higher tier Questions and model answers on Chemical Change & Rate of Reaction for the CIE IGCSE Chemistry syllabus, written by the Chemistry experts at Save My Exams. (2 marks) gy Progress of reaction Reactants Products Exam Board GCSE(9-1) Topic Rates of Reaction & Energy Changes Sub Topic Rates of Reaction Booklet Question Paper 1 Time Allowed: 58 minutes Score: /48 GCSE; AQA; Rates of reaction - AQA Test questions. Practice under timed conditions to familiarize yourself with the exam format, question types, and marking scheme. A= diagram showing a lower activation energy with a catalyst. c) Can either increase or decrease the speed of a Activity 2. Download Rates Of Reaction Exam Questions Gcse Pdf: FileName. the amount of substrate used up in the reaction or the amount of product formed Jul 4, 2019 · No matter what Chemistry specification you're studying, Seneca's revision courses contain everything you need to know for your GCSE exam. Methanol (CH 3 OH) can be made by reacting methane (CH 4) and oxygen (O 2). She calculated the rate of the reaction. Quiz 2; C) Rate of Reaction Graphs. The table below shows the bond energies. The final volume of gas produced is 60 cm 3. Over 50 quiz questions on Rate of Reaction. Mar 8, 2021 · C6. 5 Rate of Reaction - Calculations. Full lessons ready to use straight ‘out of the box’. Calculate the mean rate of the reaction using Table 3 and the equation: mean rate of reaction = PhysicsAndMathsTutor. a) = b) . The presence of a catalyst: Does not affect the position of equilibrium; Increases the rate at which equilibrium is reached; This is because the catalyst increases the rate of both the forward and backward reactions by the same amount by providing an alternative pathway requiring lower activation energy Exam-focused quizzes for Rate of Reaction. 5 cm3 15 s = 0. Increasing the number of successful collisions means that a greater proportion of reactant particles collide to form product molecules; The following all affect the rate of reaction which is dependent on the number of successful collisions per unit time: Sodium thiosulfate solution, Na 2 S 2 O 3, reacts with dilute hydrochloric acid as shown in the equation. The speed at which a reaction goes is called the rate of reaction. Feb 27, 2019 · reduce the pressure and the side of the reaction with fewer gas molecules is favoured. 9 Examples of Digestive Enzymes - Protease. Basically, the theory postulates that the rates of reactions depend on how often and how energetically the reacting molecules collide with each other. Jun 20, 2019 · energy so more successful collisions so faster reaction • the answer communicates ideas clearly and coherently uses a range of scientific terminology accurately Rates of Reaction Worksheets, Questions, and Revision for GCSE Combined Science and Chemistry. Save My Exams! – The Home of Revision For more awesome GCSE and A level resources, visit us at www. Part of Chemistry (Single Science The effect of using a catalyst. All your revision in one place. When writing chemical equations for reversible reactions, the following symbol is used: An example is, the reaction for the Haber process which produces ammonia from nitrogen and hydrogen N 2 + 3H 2 ⇌ 2NH 3 The forward reaction, producing ammonia, is endothermic; So, the reverse reaction is exothermic Quiz yourself with questions and answers for Rate of reaction Exam Questions (GCSE Chemistry AQA Paper 2), so you can be ready for test day. use a measuring cylinder to add 10 ml of sodium thiosulfate solution to a conical flask, then add 40 ml of water (concentration 8 g/dm 3); measure and record the temperature of the solution The rate of the reaction is 0,005 ∙ −1 The rate of reaction can be represented graphically: Collision theory The collision theory explains the factors that influence reaction rates. 8 Measuring Rates of Reaction for the OCR Gateway GCSE Chemistry syllabus, written by the Chemistry experts at Save My Exams. mark) Factors which affect the rates of chemical reactions. kaipqqhdgwgkuwjblzwsrhkavpwuakhriyvaodyknhrrgnrizzkskvoydan