Table 1 shows the mass measurements of copper electrodes before and after the electrolysis of copper sulfate solution for 15 minutes.
| Electrode | Mass before electrolysis (g) | Mass after electrolysis (g) | Change in mass (g) |
|---|---|---|---|
| Anode (positive electrode) | 5.82 | 4.95 | -0.87 |
| Cathode (negative electrode) | 5.50 | 6.35 | +0.85 |
Explain, in terms of copper atoms and ions, the changes in mass of the two electrodes shown in Table 1.
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.