Faraday's law is the fundamental principle of electrolysis. With the equation of this law it is possible to calculate the amount of metal that has been uniformly corroded or deposited on another, by an electrochemical process during a certain time, and is expressed in the following statements:
"The amount of any element (radical or group of elements) released either at the cathode or at the anode during electrolysis is proportional to the amount of electricity passing through the solution."
"The quantities of different elements or radicals released by the same amount of electricity are proportional to their equivalent weights."
Source: M. en I. Felipe Díaz del Castillo Rodríguez