Question

In electrolysis of water why is oxygen released at anode?

Answer 1

The electrolysis of water in the form of a chemical reaction is as follows.

$2H_{2}O⟶2H_2+O_2$

- In the electrolysis of water hydrogen and oxygen gases are released.

(a) The gas which is released at the cathode is hydrogen $H_2$ and the gas released at the anode is oxygen,$O_2$.

(b) From the above chemical reaction we can see that two moles of water undergoes electrolysis and produces two moles of hydrogen and one mole of oxygen gas.