Question

Why are more bubbles seen near cathode in electrolysis of water

Answer 1

Summary. Due to the presence of hydrogen and oxygen bubbles in theelectrolyte during water electrolysis, the potential drop between thecathode and the anode in the two phase mixture electrolyte-gas bubbleswill be increased.

Answer 2

Because the ratio of hydrogen and oxygen is 2: 1 and hydrogen is produced at cathode

Explanation:

Electrolysis of water is breaking down of water into its constituents that are hydrogen and oxygen by the action of electrical current.  

$2H_2O\rightarrow 2H^++2OH^-$

Hydrogen cation from anode moves towards the negatively charged electrode that is towards the cathode. On reaching cathode hydrogen cation accepts electrons and get reduced to hydrogen gas through reduction reaction.

At anode ;

$2OH^-\rightarrow \frac{1}{2}O_2+H_2O+2e^-$

At cathode:

$2H^++2e^-\rightarrow H_2$

As can be seen, for every two moles of water, at anode half mole of oxygen gas is evolved whereas at cathode 1 mole of hydrogen is evolved.

Learn more about electrolysis

https://brainly.com/question/11868965

https://brainly.in/question/9910664