A student investigated the effect of temperature on the rate of reaction between sodium thiosulfate solution and dilute hydrochloric acid.
The concentration of the sodium thiosulfate solution was kept at 0.15 mol/dm³.
State one other variable that must be kept constant during this investigation.
Practise Edexcel GCSE Chemistry Rates of reaction with exam-style questions for Foundation and Higher tier. 166 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
