Question

during electrolysis of water why little dilute sulphuric acid is added and name the gas obtained at anode and cathode?
calculate the volume of gases obtained at two electrodes

Answer 1

pure water is a bad conductor of electricity...

by adding sulphuric acid it becomes a conductor and start conducting electricity

volume of gases is 2:1

gas collected at anode is hydrogen and at cathode is oxygen....

Answer 2

hydrogen gas is envoled with oxygen gas

their volume is in ratio 2:1 (H : o)