Lesson: Chapter 12 — Electrochemistry

Electrolysing melts and solutions 4 of 5 Reset answers

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Question 4

In the electrolysis of acidified water, which gas has the larger volume?

A Hydrogen, at the cathode B Oxygen, at the anode C Both are equal D Chlorine, at the anode

The right answer is the one marked above.

Hydrogen, at the cathode. Water splits as 2H₂O → 2H₂ + O₂, twice as much hydrogen as oxygen.

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