Question

In the electrolysis of water,

a) Name the gas collected at anode and cathode

b) Why is the volume of gas collected at one electrode double than the other?

c) What would happen if dil H2SO4 is not added to water?

Answer 1

A) hydrogen or oxygen
B) when compound water (hydro oxide) h2o breaks apart it creates twice the volume of hydrogen and oxygen
2H2O--------------2 H2 +1 O2
C) h2so4 increase conductivity of water so it can produce at reasonably fast pace. Production of H2 and o2 would be awfuly slow.

Answer 2

a) at cathode hydrogen is collect and at anode oxygen is collect
b) because in moleculer formual of water hydrogen Is double and their ratio is 2:1 so hydrogen Is double then oxygen
c) if we not add H2SO4 to water then water is become poor conducter because pure water is poor conductor and electrolysis is slow but when add sulfuric acid then it fast