State Faraday’s second law of electrolysis.

Faraday's second law of electrolysis states that the mass of a substance deposited or dissolved at an electrode during electrolysis is directly proportional to the quantity of electric charge passed through the electrolyte. This can be expressed mathematically as:

Key Concepts

• Proportional Relationship: The mass of the substance is linked to the total electric charge.
• Charge Measurement: The charge is measured in coulombs (C).
• Electrochemical Equivalent: Each substance has a specific electrochemical equivalent, which helps in calculating the mass based on the charge.

Formula Representation

The relationship can be summarized with the formula:

m = k × Q

Where:

• m = mass of the substance deposited or dissolved
• k = electrochemical equivalent of the substance
• Q = total electric charge in coulombs

Practical Implications

This law is essential in industries that rely on electrolysis, such as electroplating and battery manufacturing, as it helps predict how much material will be deposited or consumed during the process.