Question

State Faraday's second law of electrolysis.

Answer 1

There are total 2 faraday's law of electrolysis. We are asked about the 2nd law of electrolysis. It relates the mass of the substance to the equivalent weight of it and helps in determining electricity passed.

Complete step by step answer:
- Faraday's second law is stated as the amount of substances liberated at anode are directly proportional to chemical equivalent, if the same quantity of electricity passes through them).
- The quantity needed to liberate one gram equivalent of a substance is 96,495 coulombs and it is commonly termed as 'Faraday' F.
The equation is $\dfrac{W1}{W2}=\dfrac{E1}{E2}$
- That is W is proportional to the E where W is the mass of the substance measured in grams and E is its chemical equivalent weight measured in grams per equivalent.
- We can determine the chemical equivalent of a substance by Faraday’s laws of electrolysis, and it's explained as the weight of that species which has the tendency to combine with or displace a unit weight of hydrogen.
- The chemical equivalent of hydrogen is mentioned as unity. Since valency of a substance is defined equal to the number of hydrogen atoms, which can get replaced or get combined, the chemical equivalent of a substance is actually the ratio of its atomic weight with its valency.

Note: Faraday, that is rather called the faraday constant is an electricity unit which is used for studying electrochemical reactions and is actually the amount of electric charge that releases one 1g equivalent of any ion from an electrolytic solution.