A student investigates how the mass of the anode changes during the electrolysis of copper(II) sulfate solution using copper electrodes.
Before the electrolysis is started, the initial mass of each copper electrode must be measured.
Explain how the copper electrodes should be prepared before their initial masses are determined.
Practise Edexcel GCSE Chemistry Electrolytic processes 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.