A student investigated the rate of reaction of three different carboxylic acids (methanoic acid, ethanoic acid, and propanoic acid) with solid calcium carbonate. They measured the volume of carbon dioxide gas produced in 2 minutes to compare their reactivity.
Give two control variables, other than the time period, that the student must keep the same in this investigation to ensure a valid comparison.
Practise Edexcel GCSE Chemistry Alcohols and carboxylic acids with exam-style questions for Foundation and Higher tier. 55 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.
