Be sure to answer all parts. To improve conductivity in the electroplating of automobile bumpers, a thin coating of copper separates the steel from a heavy coating of chromium. (a) What mass of Cu is deposited on an automobile trim piece if plating continues for 1.25 h at a current of 5.1 A?

Question

Physics

Magdalena Dudley

15 December, 04:44

Be sure to answer all parts. To improve conductivity in the electroplating of automobile bumpers, a thin coating of copper separates the steel from a heavy coating of chromium. (a) What mass of Cu is deposited on an automobile trim piece if plating continues for 1.25 h at a current of 5.1 A?

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Jonathan Lin · Answer 1

Total charge passed

= 1.25 x 60 x 60 x 5.1 C

= 22950 C

Equivalent mass of copper

= 63.5 / 2

= 31.75 g

96500 coulomb is required to obtain 31.75 g of copper

22950 C will release (31.75 / 96500) x 22950

= 7.55 g of copper.