A technician is calibrating an industrial electrorefining cell by measuring how the mass of a nickel cathode changes during the electrolysis of nickel(II) sulfate solution.
Before the electrolysis is started, the initial mass of the nickel cathode must be measured.
Explain how the nickel cathode should be prepared before its initial mass is 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.