Question

what is the composition of anode and cathode during electrolysis of water?

Answer 1

Answer:

the gas collected at cathode is hydrogen and the gas collected at anode is oxygen. also the gas collected at cathode is double the amount collected at anode because 2 molecule of hydrogen are present in Water and one molecule of oxygen

Answer 2

Composition of cathode and anode during electrolysis of water:

• During electrolysis, the negative portion that is oxygen is attracted to the + electrode, i.e. the anode, while the positive portion, that is hydrogen, is attracted to the - electrode, i.e. the cathode.

• At the cathode, the volume of the gas (Hydrogen) is twofold than the volume of gas (Oxygen) at the anode as in each molecule of water (H2O) you can see that there are 1 atom of oxygen and 2 atoms of hydrogen are present.  

• One mole of both elements that are hydrogen and oxygen has an equivalent volume at standard temperature and pressure.
• Therefore, the volume of hydrogen that is gathered at the cathode is twofold the volume of oxygen that is gathered at the anode.

Hope it helped..