An electrochemist investigated how the mass of copper deposited on a steel cathode varied with the electric current during the electrolysis of an acidic copper(II) sulfate solution. The electrolysis was carried out for exactly 15 minutes in each run.
The results are shown in Table 1.
| Current (A) | Mass of copper deposited (g) |
|---|---|
| 0.0 | 0.00 |
| 0.5 | 0.15 |
| 1.0 | 0.30 |
| 1.5 | 0.44 |
| 2.0 | 0.59 |
| 2.5 | 0.74 |
State and explain the trend shown in these results.
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.