A student made three cells. Each cell contained a copper electrode and one other metal electrode, standing in the same electrolyte. The three metals J, K and L are all more reactive than copper. The table shows the student's results.
Table: The metal used as the second electrode in each of three cells, and the voltage that each cell produced
| Metal used as the second electrode | Voltage in V |
|---|---|
| J | 0.46 |
| K | 1.56 |
| L | 0.78 |
Give the letter of the metal that is the most reactive of the three metals.
Explain your answer to part a.
The student now makes a cell using metal J and metal L as the two electrodes, in the same electrolyte.
Predict the voltage of this cell.
40 exam-style questions on AQA GCSE Chemistry 5.2 Chemical cells and fuel cells, covering 5.2.1 Cells and batteries, 5.2.2a Fuel cells, and 5.2.2b Half equations for hydrogen fuel cells. Each one has a worked solution and a mark scheme showing where the marks go.