Table 1 shows the mass of a copper cathode and the appearance of the aqueous copper(II) sulfate electrolyte before and after an electrolysis experiment using copper electrodes.
| Mass of copper cathode (g) | Appearance of copper(II) sulfate solution | |
|---|---|---|
| Before electrolysis | 5.20 | Clear, blue solution |
| After electrolysis | 5.85 | Clear, blue solution |
Explain, in terms of ions, the change in mass of the cathode shown in Table 1.
Practise Edexcel GCSE Chemistry Electrolytic processes with exam-style questions for Foundation and Higher tier. 83 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.
