An engineer sets up an electroplating cell to coat a steel key with a protective layer of nickel, as shown in Figure 1.

State why aqueous nickel(II) chloride, rather than solid nickel(II) chloride, must be used in this electroplating process.
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.