試題詳解

75. A product is electroplated by copper from CuSO₄ solution. A constant current of 9.65 amp is applied by an external power supply. How long will it take to deposit 6.35 × 10² g of Cu onto the surface of product? (Cu = 63.5 g/mol) (1F = 96485 C/mol)
(A) 14.22 s
(B) 8.9 min
(C) 2.54 h
(D) 55.5 h
(E) 1.37 days