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GCSE Chemistry Notes: The effect of concentration on reaction rate (speed)
IGCSE AQA GCSE Chemistry A level Edexcel GCSE Chemistry A level OCR Gateway Science Chemistry A level OCR 21st Century Science Chemistry
REACTION RATE and CONCENTRATION Doc Brown's Chemistry KS4 science GCSE/IGCSE/O level Revision Notes - Factors affecting the Speed-Rates of Chemical Reactions 3a. What is the effect of changing concentration on the rate of a chemical reaction? Doc Brown's chemistry revision notes: basic school chemistry science GCSE chemistry, IGCSE chemistry, O level & ~US grades 8, 9 and 10 school science courses or equivalent for ~14-16 year old science students for national examinations in chemistry 3. The Factors affecting the Rate of Chemical Reactions Varying the CONCENTRATION of a reactant
When dealing with concentration and its effect on rates of reactions, you are usually concerned with solutions, BUT, all the arguments, graphs, explanations etc. described here, could equally apply to a mixture of gases. Experimental methods for investigating the effect of reactant concentration on the rate of a chemical reaction. Parts of the sections of 1. Introduction and 2. collision theory are repeated here, but with extra experimental methods and theoretical details applied to experiments and theories linked to the effect of changing the solution concentration on the rate of a chemical reaction
Theoretical interpretation of the results of the effect of concentration on the rate of a chemical reaction For each factor I've presented several particle diagrams to help you follow the text explaining how the particle collision theory accounts for your observations of reaction rate varying with reactant concentration (some 'work' better than others!)
A picture of a particles (ions or molecules) undergoing changes in a chemical reaction
The product molecules are not shown, but just imagine how more collisions will occur in the right-hand diagrams!
APPENDIX 3a (Data for a student's exercise in May 2000, at the 'birth' of my website!) A more detailed example of 'effect of concentration' results using the Excel software package. e.g. from the limestone - hydrochloric acid reaction using a gas syringe system
The results tabulated in Microsoft Excel software for four steadily increasing concentrations of the hydrochloric acid (four different molarities of hydrochloric acid, 0.50 mol/dm3 to 2.0 mol/dm3) Experiments should be done with a constant volume of acid, constant mass of limestone and constant temperature.
The Excel graph of the results for four concentrations of the acid Series 1 = 0.50 mol/dm3, series 2 = 1.0 mol/dm3, series 3 = 1.5 mol/dm3, series 4 = 2.0 mol/dm3 From the plots you get four initial rate gradients from the graph eg series 2, for the 1.0 molar acid, initial gradient = rate = 19/2 = 8.5 cm3/min Reminder: You should measure the gradient by drawing a line from 0,0 on the axis over the first few minutes, where the graph is reasonably linear, because the rate is decreasing as the reactants are being used up. Beyond the initial few minutes the graph becomes quite curved and inaccurate. More details of laboratory investigations ('labs') involving 'rates of reaction' i.e. experimental methods for observing the speed of a reaction including the effect of reactant concentration are given in the INTRODUCTION
Key words phrases: How can we investigate the effect of concentration on the rate of a reaction? How does changing concentration affect the rate of a reaction? Why does changing concentration change the speed of a reaction? How can we investigate the effect of concentration on the rate of a chemical reaction? What apparatus do we need to investigate the effect of concentration on the speed of a reaction? How do we process the results from concentration experiments? These revision notes are suitable for GCSE IGCSE O Level KS4 science chemistry students studying how the rate of a reaction varies with the concentration of a reactant in solution. The descriptions of experiments to do with rate concentration experiments and theoretical explanations should help with homework, coursework assignments, laboratory experiment investigations 'labs' on how the speed of a reaction depends on concentration. These notes on the effect of changing concentration on reaction rate, and the experiment methods to follow the speed of the reaction as it changes with change in concentration of reactant and the experimental methods and investigations involved are designed to meet the highest standards of knowledge and understanding required for students/pupils doing GCSE chemistry, IGCSE chemistry, O Level chemistry, KS4 science courses and can be useful primer for A Level chemistry courses. These revision notes on the effect of changing reactant concentration on the rate of a chemical reaction speed, should prove useful for the new AQA GCSE chemistry, Edexcel GCSE chemistry & OCR GCSE chemistry (Gateway & 21st Century) GCSE (9–1), (9-5) & (5-1) science courses. GCSE chemistry IGCSE chemistry revision notes on reaction rates effect of concentration KS4 GCSE Science revision notes on reaction rates effect of concentration GCSE chemistry guide notes on reaction rates effect of concentration for schools colleges academies science course tutors images pictures diagrams for reaction rates effect of concentration science chemistry revision notes on reaction rates effect of concentration for revising chemistry module topics notes to help on understanding of reaction rates effect of concentration university courses in science careers in science jobs in the industry laboratory assistant apprenticeships technical internships USA US grade 8 grade 9 grade10 AQA chemistry science GCSE notes on reaction rates effect of concentration Edexcel chemistry science notes on reaction rates effect of concentration for OCR 21st century chemistry science notes on reaction rates effect of concentration OCR GCSE Gateway science chemistry notes on reaction rates effect of concentration WJEC gcse science chemistry notes on reaction rates effect of concentration CCEA/CEA gcse chemistry notes science O level chemistry notes for reaction rates effect of concentration IGCSE chemistry revision notes on reaction rates effect of concentration O level chemistry notes should prove useful for the new AQA chemistry, Edexcel chemistry & OCR chemistry GCSE (9–1, 9-5 & 5-1) science courses Using the kinetic particle model, how do you explain the effect of changing concentration on the speed or rate of a chemical reaction? what apparatus do you need to investigate the effect of changing the concentration on the speed of a reaction? describe an experimental procedure to investigate the effect of changing concentration on the rate of a chemical reaction, how do you draw the graphs of data from an investigation into the effect of changing concentration on the speed/rate of a chemical reaction? investigating the effect of changing the concentration of hydrochloric acid reacting with limestone (calcium carbonate), experiment to investigate the effect of changing concentration on the rate of decomposition of hydrogen peroxide solution using a manganese dioxide catalyst, how to investigate the effect of changing concentration on the rate of reaction between sodium thiosulfate and hydrochloric acid solutions?, particle model diagrams to show the effect of increasing or decreasing concentration on the rate/speed of a reaction gcse chemistry revision free detailed notes on reaction speed effect of changing concentration to help revise igcse chemistry igcse chemistry revision notes on reaction speed effect of changing concentration O level chemistry revision free detailed notes on reaction speed effect of changing concentration to help revise gcse chemistry free detailed notes on reaction speed effect of changing concentration to help revise O level chemistry free online website to help revise reaction speed effect of changing concentration for gcse chemistry free online website to help revise reaction speed effect of changing concentration for igcse chemistry free online website to help revise O level reaction speed effect of changing concentration chemistry how to succeed in questions on reaction speed effect of changing concentration for gcse chemistry how to succeed at igcse chemistry how to succeed at O level chemistry a good website for free questions on reaction speed effect of changing concentration to help to pass gcse chemistry questions on reaction speed effect of changing concentration a good website for free help to pass igcse chemistry with revision notes on reaction speed effect of changing concentration a good website for free help to pass O level chemistry GCSE (9–1, 9-5 & 5-1) science courses |
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