Faraday's Law:

Faraday's law states that the quantity of current (Coulombs) associated with an electron transfer process is directly proportional to the number of equivalents of the substance involved in chemical change at the electrode. The number of equivalents is the number of moles divided by the number of electrons taking part in electrons transformation reaction. That is expressed as given below:

Q   ∝ number of equivalents

or        Q = F ×  number of equivalents    ... (1.2)

or        Q = F ×  number of moles/n          ... (1.3)

Note that F could be defined as the quantity of electricity associated with an Avogadro number of electrons.

where F is the Faraday constant and is equal to 96494 Coulombs, n is the number of electrons taking part in the electrical transformation reaction, such as considering the general reaction for reduction with n electron transfer:

O + ne →       R

here O is denote the species being reduced and R is the reduction product.