Question

Aluminium metal can be made from aluminium ions by electrolysis. What mass of aluminium metal would be recovered if a current of 2.50 × 103 A passed through the solution for 15.0 minutes? Assume the yield is 100%.

Answer 1

Al³⁺+3e^- -->Al_(s);

n(Al)=Q/(F*3)=15*60*2.5*10^3/(3*96500)=7.77 mol;

m(Al)=7.77*27=210 g;

Answer: 210 g;