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]
A. N12.00 B. N27.00 C. N63.00 D. N95.00
Correct Answer: C
Explanation
For X: X\(^{2+}\) + 2e\(^-\) \(\to\) X 2F = 63g xF = 6g x = \(\frac{6 \times 2}{63} = \frac{4}{21} F\) \(\frac{4}{21}\)F = N12.00 1F = \(\frac{12}{\frac{4}{21}}\) = N63.00 1F is equivalent to N63.00. For Y: Y\(^{3+}\) + 3e\(^-\) \(\to\) Y 3F = 27g xF = 9g x = \(\frac{3 \times 9}{27}\) = 1F 1F = N63.00
