First slide

Faraday's Laws

Question

18 grams of acidulated water is subjected to electrolysis using 965 amperes. Time required for electrolysis is

Moderate

A

100 seconds
B

400 seconds
C

800 seconds
D

200 seconds

Solution

$2 H_{2} O \overset{4 F}{\to} 2 H_{2} + O_{2};$
36 grams of water requires 4F
18 grams of water requires 2F
q = it
2 x 96500 =965 x t
t = 200 seconds.

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