A student investigated how the mass of silver deposited at the negative electrode (cathode) changed when the electric current was varied during the electrolysis of silver nitrate solution. The current was passed through the solution for exactly 10 minutes in each test.
The results are shown in Table 1.
| Current (A) | Mass of silver deposited (g) |
|---|---|
| 0.0 | 0.00 |
| 0.2 | 0.13 |
| 0.4 | 0.27 |
| 0.6 | 0.40 |
| 0.8 | 0.54 |
| 1.0 | 0.67 |
State and explain the trend shown in these results.
83 exam-style questions on Edexcel GCSE Chemistry 4.2 Electrolytic processes, covering 4.2.1 Electrolytes and the process of electrolysis, 4.2.2 Products of electrolysis using inert electrodes, 4.2.3 Half equations, oxidation and reduction in electrolysis, and 4.2.4 Electrolysis of copper sulfate and purifying copper. Each one has a worked solution and a mark scheme showing where the marks go.