G.C.S.E Chemistry coursework: Investigating the effect of temperature on the rate of reaction between sodiumthiosulphate and hydrochloric acid

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Tuesday 18th may 2004                                                            Gurjant Rai

G.C.S.E Chemistry coursework

        

Investigating the effect of temperature on

the rate of reaction between sodium

thiosulphate and hydrochloric acid

                           

Planning

                My coursework for G.C.S.E Chemistry will be based on the rate of reaction.  I will be investigating the effect of temperature on the rate of reaction and will analyze the reaction between sodium thiosulphate and hydrochloric acid at different temperatures to see the effect of heat. I will be reacting sodium thiosulphate with hydrochloric acid at different temperatures. I will place 50cm3 of sodium thiosulphate and 5cm3 of hydrochloric acid in one conical flask. I will subsequently put the solution which is in the conical flask on a paper which will have a cross on it. When the sodium thiosulphate reacts with the hydrochloric acid it will turn to a milky/cloudy colour. I will then look through the solution and see the cross; the experiment will be timed to check the time it takes for the cross to disappear and at what temperature the solution will be at to make the cross to disappear.

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Preliminary work

A pretest will be needed in order to get the feel of what the experiment will be about. The pretest will help me make decisions on what equipment I will be using to do the experiment. The pretest will also help me to see what sort of problems I might face. The pretest will also show me what kind of results I will need when I do the experiment a second time. I will also see what I need to do to make the experiment a fair test and the pretest will also give me a good ...

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