Question

In the electrolysis of water, why is the volume of a gas collected over one electrode double that of a gas collected over the other electrode?

Answer 1

The balanced chemical equation for the electrolysis of water is

2 H2O(l) → 2 H2(g) + O2(g)

It can be observed from the balanced chemical equation that the volumes of hydrogen and oxygen produced during electrolysis are in the ratio 2:1. Thus, the volume of hydrogen gas collected in the process is double than that of oxygen.

Answer 2

Explanation:

Electrolysis of water is the decomposition of water into oxygen and hydrogen gas due to the passage of an electric current.It ideally requires a potential difference of 1.23 volts to split water.

This technique can be used to make hydrogen gas and breathable oxygen. However, as hydrogen is an important industrial commodity, by far most industrial methods produce hydrogen from natural gas instead, in the steam reforming process.

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