Answer to Question #263676 in Physical Chemistry for Philip

Question

1.If the cost of electricity required to discharge 10g of an ion X3+3+ is N20.00, how much would it cost to discharge 6g of ion Y2+2+?

[1 faraday = 96,500C, atomic masses are X = 27, Y = 24]

2. 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]

Answer 1

The answer is in the image

7g of X = 3×96500

10g of X = 289500×10/27

= 107222C

24g of Y= 2×96500

6g of Y= 6×2×96500/24

= 48250C

107222---->N20

48250---> 20×48250/107222

= N9