After one week, two test tubes containing damp air were examined.
The findings are recorded in the table below:
| Appearance after one week | |
|---|---|
| Test Tube 1 (Iron nail wrapped in zinc wire) | The zinc wire has corroded/dissolved, but the iron nail remains shiny and unchanged. |
| Test Tube 2 (Iron nail alone) | A reddish-brown flaky deposit has formed on the surface of the iron nail. |
Explain the results of this experiment.
97 exam-style questions on Edexcel GCSE Chemistry 6.1 Transition metals, alloys and corrosion, covering 6.1.1 Properties of transition metals, 6.1.2 Corrosion and its prevention, and 6.1.3 Alloys and the uses of metals. Each one has a worked solution and a mark scheme showing where the marks go.