Question

How many grams of Ca metal are produced by the electrolysis of molten CaBr2 using a current of 30.0 amp for

5.50 hours?

Answer 1

Answer: 123 g

Explanation: Q =It = nzF. For Ca^2+ z= 2, t = 5.5 x 3600 s and I = 30.0

And F= 96485 As/mol

Amount of moles is n = It /zF = 3.078 mol , multiply with atomic mass 40.08 g/mol