A student investigates the reactivity of four different metals by adding them to dilute sulfuric acid and measuring the maximum temperature rise. The student uses a 1 cm strip of each metal ribbon.
State two control variables concerning the sulfuric acid that must be kept constant to ensure the results are valid.
Practise Edexcel GCSE Chemistry Obtaining and using metals with exam-style questions for Foundation and Higher tier. 100 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.