CH-1735
Simple cells
Chemistry · Secondary 4 · Medium · Simple cells
In an experiment, a simple cell is made using zinc and iron electrodes in dilute sulfuric acid. After some time, a layer of solid forms on the iron electrode and the current decreases. Which statement best explains this observation?
- A layer of zinc forms on iron, reducing further reaction and current.
- The iron electrode dissolves completely, stopping the circuit.
- The sulfuric acid instantly runs out, so no ions remain.
- Electrons stop moving because zinc becomes less reactive over time.
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