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a thin circular-disk earning,5.00 cm in diameter is plated with a coating of gold 0.20 mm...

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Chemistry

a thin circular-disk earning,5.00 cm in diameter is plated witha coating of gold 0.20 mm thick from an Au+3 bath.

a) how many days does it take to deposit the gold on one side ofthis earring if the current is 0.010 Ampere (d of Au = 19.3g/cm3)

b) how many days does it take to deposit the gold on both sidesof a pair of these earrings

c) if the price of Au is $320 per troy ounce 31.10 grams), whatis the total cost of the gold plating?

Answer & Explanation Solved by verified expert
3.8 Ratings (518 Votes)
The electroplating technique is used for the coating of gold on the circular disk The circular disk is of 5cm we want to have a gold coating of 02 mm thick on the disk The overall calculation phenomenon is explained by Faradays Law Faradays Law is as below W I x t x A n x F 1 Where W weight of plated metal in grams I current in    See Answer
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