Question

100g fairly concentrated solution of cuso4 is electrolysed using 0.1F electricity. the weight of resulting solution will be

Answer 1

Weight of the resulting solution is 96.825 g

Given-

• Initial Weight of the solution is = 100 g
• Current deposit = 0.1 F

According to the first law of Faraday

W =ZQ

where W is the weight of the substance and Z is the electro chemical equivalent.

We know that Q = i×t where i is the current and t is the time.

1 Faraday current deposits = 63.5/2 = 31.75 g of copper

0.1 Faraday current deposits = 31.75 × 0.1 = 3.175 g of copper

Initial weight of solution = 100 g

After electrolysis weight of solution = 100 - 3.175 = 96.825 g