How long did the chrome plating take if a layer of chrome weighing 0.864 g was deposited on the product?

How long did the chrome plating take if a layer of chrome weighing 0.864 g was deposited on the product? The current strength is 4A, the electrochemical equivalent of chromium is -0.18 * 10-6 kg / C.

To find the required duration of chromium plating of the taken product, we apply the first Faraday’s law: m = k * I * t, from where we express: t = m / (k * I).

Variables and constants: m is the mass of the chromium layer deposited on the product taken (m = 0.864 g = 0.864 * 10 ^ -3 kg); k – electrochemical equivalent of chromium (k = 0.18 * 10 ^ -6 kg / C); I – current strength (I = 4 A).

Calculation: t = m / (k * I) = 0.864 * 10 ^ -3 / (4 * 0.18 * 10 ^ -6) = 1200 s or 20 min.

Answer: Chrome plating of the taken product lasted 20 minutes.