Question

Write the products of electrolysis of aqueous solution of nacl with platinum electrodes.

Answer 1

Hey buddy,

● Electrolysis of NaCl(aq) -
When aquous sodium chloride undergo electrolysis in presence of platinum electrodes, the reaction is follows-
NaCl ---> Na+ + Cl-
H20 ---> H+ + OH-

At anode, Cl- ions are discharged in preference to OH- ions.
Cl- ---> (1/2)Cl2 + e-

At cathode, H+ ions are discharged in preference to Na+ ions.
H+ + e- ---> (1/2)H2

Overall reaction is -
NaCl + H20 ---> Na+ + OH- + (1/2)H2 + (1/2)Cl2


Hope this is helpful...

Answer 2

Electrolysis of NaCl(aq) with platinum electrodes,

When aquous solution of sodium chloride undergoes electrolysis in presence of platinum electrodes, the reaction is as below,

NaCl ---> Na+ + Cl-

H20 ---> H+ + OH-

At anode, Cl- ions are discharged in preference to OH- ions as oxidation potential of chlorine is higher than hydroxyl ion.

Cl- ---> (1/2)Cl2 + e-

At cathode, H+ ions are discharged in preference to Na+ ions as the reduction potential of H+ is higher than Na+ ion.

H+ + e- ---> (1/2)H2

The Overall reaction is -

NaCl + H20 ---> Na+ + OH- + (1/2)H2 + (1/2)Cl2

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