What amount of mercury would be liberated if th... - JAMB Chemistry 2002 Question
What amount of mercury would be liberated if the same quantity of electricity that liberates 0.65g of zinc is applied?
A
2.01g
B
1.00g
C
4.02g
D
8.04g
correct option: c
Zn2+ + 2e- → Zn
2F will be liberated 65g of Zn, if 0.65gm of Zn is liberated, the quantity of electricity used
X = (0.65/65) * 2
= 0.02F
∴ Hg+ + e- → Hg1
i.e 1F → 201gm of Hg
∴ 0.02 will liberated
Y = (0.02/1) * 201
= 4.02g
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