ASAP If a current of 7.0 amps is passed through a solution of Z3+ for 2.0 hours, how many grams of Z metal (MM = 144.6) are produced?

Question

If a current of 7.0 amps is passed through a solution of Z3+ for 2.0 hours, how many grams of Z metal (MM = 144.6) are produced?

Show all steps and calculations

Answer 1

Things to know:

1 amp = 1 coulomb / second

96,500 C = charge on 1 mole of electrons

2.0 hours x 60 min / hour x 60 sec / min = 7200 sec

7200 sec x 7 C / sec = 50,400 C

50,400 C x 1 mol electrons / 96,500 C = 0.522 moles electrons

0.522 mols electrons x 1 mol Z / 3 mols electrons = 0.174 mols Z

0.174 mols Z x 144.6 g / mol = 25 g Z (2 sig figs)