What Mass of Hf?

Question

What mass of Hf can be produced from aqueous Hf+4 in 1.0 hr with a current of 15 A?

Answer 1

1 hr = 3600 sec

15 A = 15 C/sec

3600 sec x 15 C/sec = 54,000 C

54,000 C x 1 mole e-/96485 C = 0.5597 mol e-

0.5597 mol e- x 1 mol Hf/4 mol e- x 178g/mole = 24.9 g = 25 g Hf1