Question

What is released at anode in electrolysis of acidified water using platinum electrode

Answer 1

I think that is oxygen gas at anode

Answer 2

Answer:

Explanation:

Electrolysis of Acidified Water

 

Electrolyte: Acidified water

Anode: Platinum

Cathode: Platinum

Dissociation reaction:

        2H2O        2H2       +       O2

Acidified water               Hydrogen gas    Oxygen gas

Discharge of Ions at Electrodes

At Cathode (Negative

electrode)

At Anode (Positive

electrode)

Positively charged ions (cations) get attracted to the cathode and gain electrons from it to form neutral atom. i.e, H atom.

Negatively charged ions (anions) get attracted to the anode and lose electrons from it to form neutral atom. i.e, Cl atom.

Reaction at cathode:

H+ + e̶  → H

H + H → H2 (Hydrogen molecule)

Reaction at anode:

OH- ̶  e ̶→OH × 4

OH-  ion discharge in preference to SO42-

4OH → 2H2O + O2 (Oxygen molecule)

Product formed at cathode:

2 Volumes of hydrogen

Product formed at anode:

1 Volume of oxygen

Test for the gases Evolved

Hydrogen: gives pop sound.

Test for the gases Evolved