Question

In electrolytic decomposition of water two gases are liberated at the electrodes. Give the mass ratio of the gas liberated at the cathode and at the anode.

Answer 1

Hydrogen \[\ce{(H2)}\] is at the cathode, and oxygen \[\ce{(O2)}\] is at the anode. The mass ratio of hydrogen to oxygen is 2 : 1 due to the molecular ratio in water \[\ce{(H2O)}\].