During electrolysis of water, the volume of hydrogen gas collected at the cathode is double the volume of oxygen gas collected at the anode. Why?
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Hydrogen is collected in the double amount during the electrolysis of water. This is because H2O contains two parts of hydrogen as compared to one part of oxygen by volume.
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Since the formula of water is H2O so from formula we can get that there are 2 atoms of hydrogen and 1 atom of oxygen. So, the volume of hydrogen gas collected at the cathode is double.
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