Faradays Second Law of Electrolysis

For a given amount of electric charge, the substance consumed or produced at one of the electrodes is directly proportional to the equivalent mass. Faraday s laws can be written together as 

For Faraday s first law, M, F, and n are constants, so Q changes directly as m changes. For Faraday s second law, Q, F, and n are constants, so that the value of equivalent mass 4M/n changes as changes. 

In order to produce 1 mol of sodium metal, 1 mol of electrons is required, so one Faraday of charge must pass through the cell. To produce 1 mol of chlorine gas, 2 Faradays of electric clwge must pass tirrough the cell. Thus, a passage of 2 Faradays of charge 3delds 2 mol of sodium metal and 1 mol of chlorine gas. 

let us apply Faraday s first law of electrolysis to the example of electrolysis of Nal solution. In this reaction, 1 mol of I2 was produced by 2 Faradays, which means that to produce 10 mol of I2 requires the passage of 20 Faradays through the cell. 

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