In a certain electroplating process gold is deposited by usi

In a certain electroplating process gold is deposited by using a current of 15.4 A for 20.2 minutes. A gold ion, Au+, has a mass of approximately 3.3 × 10-22 g, and the charge of one electron is 1.6× 10-19 C. How many grams of gold are deposited by this process? (Give your answer to the nearest 0.1 g)

Solution

Electro chemical equivalent of gold Z = 0.0006812 gm/Coulomb

The mass of gold deposited m= Zit

m= 0.0006812*15.4*20.2*60

m = 12.71 gm