A manufacturer tests three metal electrode cartridges for a simple cell used in a remote weather sensor. Metals M and N are both more reactive than metal P. The same electrolyte and conditions are used for every test.
The quality-control record is incomplete.
| Metal electrode pair | Voltage in V |
|---|---|
| M and P | 1.42 |
| N and P | 0.57 |
| M and N | Not measured |
Predict the voltage produced using metal M and metal N as the electrodes.
90 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.