A thin circular-disk earrings 10.0cm in diameter is plated with a coating of gold 0.20mm thick from an Au3+ bath. How many days (approx.) does it take to deposit the gold on one side of one earring if the current is 0.193 ampere.

Eq. = no. of faraday 1 0 * 0 . 2 * 1 0 − 2 * 1 9 . 7 1 9 7 * 3 = 0 . 1 9 3 * t 9 6 5 0 0

A thin circular-disk earrings 10.0cm in diameter is plated with a coating of gold 0.20mm thick from an Au³⁺ bath. How many days (approx.) does it take to deposit the gold on one side of one earring if the current is 0.193 ampere.

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4 months ago

Eq. = no. of faraday

$\frac{10 * 0.2 * 1 0^{- 2} * 19.7}{197} * 3 = \frac{0.193 * t}{96500}$

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