The cost of discharging 6.0g of a divalent metal, X from ...
The cost of discharging 6.0g of a divalent metal, X from its salt is ₦12.00. What is the cost of discharging 9.0g of a trivalent metal, Y from its salt under the same condition?
[X = 63, Y = 27, 1F = 96,500C]
N12.00
N27.00
N63.00
N95.00
Correct answer is C
For X: X2+ + 2e− → X
2F = 63g
xF = 6g
x = 6×263=421F
421F = N12.00
1F = 12421
= N63.00
1F is equivalent to N63.00.
For Y: Y3+ + 3e− → Y
3F = 27g
xF = 9g
x = 3×927
= 1F
1F = N63.00
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