This question is about chemical cells and batteries.
A student investigated the voltage produced by different chemical cells using the apparatus shown below.
The student used the following method:
- Use magnesium as Electrode X.
- Record the cell voltage.
- Repeat steps 1 and 2 using different metals as Electrode X.
Table 1 shows the student's results:
| Electrode X | Voltage of the cell (V) |
|---|---|
| magnesium | 2.71 |
| zinc | 1.10 |
| iron | 0.78 |
Suggest two variables the student should keep the same to make the investigation valid.
Write the three metals used for Electrode X in order of reactivity from most reactive to least reactive, using Table 1.
Predict the voltage if Copper is used as Electrode X, and give one reason for your answer.
Describe how to make a 12 V12\text{ V}12 V battery using 1.5 V1.5\text{ V}1.5 V cells.
Chemical cells and fuel cells (chemistry only) Questions
Practise AQA GCSE Chemistry Chemical cells and fuel cells (chemistry only) with exam-style questions for Foundation and Higher tier. 20 questions covering Cells and batteries and Fuel cells, matched to the AQA GCSE Chemistry (8462) 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.