What quantity of electricity will liberate 0 12... - JAMB Chemistry 2020 Question
What quantity of electricity will liberate 0.125 mole of oxygen molecules during the electrolysis of dilute sodium chloride solution?
A
24,125 C
B
48,250 C
C
72,375 C
D
96,500 C
correct option: b
4OH ⇒ 2H\(_2\)O + O\(_2\) + 4e- ........ (i)
From equation (i):
1 mole of Oxygen requires 4e
i.e 1 mole of Oxygen requires 4F,
where 1F = 96,500 C
[ 4 X 96,500 X 0.125 ] ÷ 1
= 48,250 C
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