Faraday’s law connects the number of mole of electrons, current used and time as one equation. The amount of chemical substance that is either formed or used is directly proportional to the amount of electricity that passes through the cell. Faraday’s law is useful for determining how much metal is being electroplated, how long an object should be left to electroplate for given certain conditions as well as what size of current should be used.
The first law of electrolysis is:
Where Q is the electrical charge in coulombs, I is the current in amps and t is time in seconds.
The second law of electrolysis is:
Where Q is the electrical charge, n(e^{–}) is the number of mole of electrons as stated by the half equation and F is Faraday’s constant which is equals to 96500C.
By combining the two laws of electrolysis, an equation that relates time, number of moles of electrons and current is formed:
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