Rates Of Reaction

In this investigation, I will be studying the factors that affect the rate of reaction. In this case, the reaction between hydrochloric acid and sodium thiosulphate. Na2S2O3 (aq)+ 2HCl(aq) 2NaCl(aq)+S(s)+SO2(g) When hydrochloric acid is added to sodium thiosulphate, the chemicals react giving solid sulphur as one of the products. This is a precipitation reaction. By watching the speed at which the sulphur has formed, we can find …

…to collect six different sets of results, and with this I was able to create a good graph. This number I feel was enough, as the line of best fit on my graph was a straight one and showed no sign of altering. Collecting results using concentrations in between the ones I have used would have been difficult to measure, and the variations in time would have been too short, and of no real significance.