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1 March, 06:06

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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  1. 1 March, 09:54
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    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.
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