A student investigated the electrolysis of silver nitrate solution using active silver electrodes.
Table 1 shows the mass measurements of the silver electrodes before and after the electrolysis was carried out for 20 minutes.
| Electrode | Mass before electrolysis (g) | Mass after electrolysis (g) | Change in mass (g) |
|---|---|---|---|
| Anode (positive electrode) | 12.45 | 11.23 | -1.22 |
| Cathode (negative electrode) | 10.15 | 11.35 | +1.20 |
Explain, in terms of silver 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. 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.
