First slide

Electrolysis

Question

Aqueous solution of AgNO₃ is electrolysed using inert electrodes. At the end of electrolysis

Easy

A

pH of the solution increases
B

pH of the solution decreases
C

pH of the solution remains unchanged
D

pH of the solution becomes 14

Solution

Electrolysis of aq.AgNO₃
$AgN{O_3} \rightleftharpoons A{g^ + } + NO_3^ -$
At Cathode
Ag⁺ is gets reduced.
$SRP\,\,of\,\,{H_2}O < SRP\,of\,A{g^ + }$
$A{g^ + } + {e^ - } \rightleftharpoons Ag$
At Anode
$SOP\,\,of\,\,NO_3^ - < SOP\,of\,{H_2}O$
H₂O is oxidised.
$2{H_2}O \rightleftharpoons {O_2} + 4{H^ + } + 4{e^ - }$
In the vessel HNO₃is left . p^H of the solution decreases.

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