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An investigation into rates of reaction - Theory
Member rating: No Rating | Words: | Submitted: Tue Mar 15 2005
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Chemistry Coursework Title: An investigation into rates of reaction Aim: A study of the effect of changing the concentration of a solution on the rate of reaction. Prediction: The effect of changing the concentration of a solution, on the rate of a reaction. A concentrated solution can be made of dissolving a large amount of solute in a small amount of solvent. A dilute solution can be made by dissolving a little solute in a large amount of solvent. A concentrated solution A dilute solution Table of results: Expt No Total Volume Concentration of sodium thiosulphate Volume of dilute hydrochloric acid Time 1st attempt (s) Time 2nd attempt (s) Time Avergae 1 25 0.2 10 21 25 28 2 25 0.16 10 60 29 20 3 25 0.12 10 4 25 0.08 10 5 25 0.04 10 Theory: There are fast reactions and also slow reactions. For example toasting a piece of bread would take about two minutes and lighting a match up would take 2 seconds. Chemical reactions occur when particles collide with enough energy to form new substances. The rate of reactions can...
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