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GCSE Chemistry Coursework How does the concentration of sodium thiosulphate affect the rate of reaction of with hydrochloric acid? In this coursework I aim to find out how the concentration of sodium thiosulphate affects the rate of reaction of with hydrochloric acid. I aim to see if higher or lower concentrations make the rate of reaction faster or slower. The aim of the experiment is to test different concentrations to see which works best. The aim is to find the best concentration by seeing which concentration makes the experiment work faster. This is when the reaction between sodium thiosulphate and hydrochloric acid is at its fastest. I will find out the rate of reaction, which is done by diving 1 by the average time taken. I will test this by using 30ml of sodium thiosulphate and 0ml of water, and gradually getting more dilute. I will go on to use 25ml of...

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