The quantitative amount of products of electrolysis can be determined by applying Faradays 1st law of electrolysis.
Faradays 1st law of electrolysis states that “the mass/amount of substance liberated/produced/used at cathode / anode during electrolysis is directly proportional to the quantity of electricity passed/used.”
a)The SI unit of quantity of electricity is the coulomb(C).
The coulomb may be defined as the quantity of electricity passed/used when a current of one ampere flow for one second.i.e;
1Coulomb = 1 Ampere x 1Second
The Ampere is the SI unit of current(I)
The Second is the SI unit of time(t)
therefore;
Quantity of electricity(in Coulombs) = Current(I) x time(t)