Question

In the electrolysis of water: (a)why is the volume of gas collected at one electrode is double the other? (b) why is few drops of H2SO4 is added to the water?

Answer 1

Because H2O found in water is in the form of 2H2O so, if one O2 molecule comes out of anode then two H2 molecules will come out of the cathode. As it is said in its formula 2(H2.O)

Answer 2

Answer:

In electrolysis of water :

a ) . Hydrogen gas collected at cathode. And oxygen gas gas collect at anode.

b ) . We know that in water there is 2 hydrogen atom and 1 oxygen atom. That's why volume of gas collected at one electrode double than the other.

c ) . Pure water is a bad conductor of electricity when we add drops of dil sulphuric acid we make it a good conductor of electricity.