Question

_________ is used to calculate theoretical weight deposited on the electrode during electrolysis.

• A. Faraday’s Law
• B. Hess Law
• C. De Bragg’s Law
• D. Stoke’s Law

Hint:

Faraday’s Laws of Electrolysis relate the mass of substance deposited on an electrode to the electric charge passed through the electrolyte.

Answer 1

The Correct Option is A

Faraday’s laws of electrolysis describe the quantitative relationship between the amount of substance deposited or liberated at an electrode and the amount of electric charge passed through the electrolyte. Step 1: Understanding Faraday’s Laws Faraday formulated two laws: 1. First Law: The mass of substance deposited at an electrode is directly proportional to the charge (\( Q \)) passed through the electrolyte. \[ m = Z Q \] where \( Z \) is the electrochemical equivalent of the substance. 2. Second Law: The mass of different substances deposited by the same amount of charge is proportional to their equivalent weights.

Step 2: Evaluating the Options - Option (A) - Correct: Faraday’s Law accurately calculates the theoretical weight deposited during electrolysis. - Option (B) - Incorrect: Hess’s Law is related to the enthalpy changes in thermodynamics. - Option (C) - Incorrect: Bragg’s Law deals with X-ray diffraction and crystallography. - Option (D) - Incorrect: Stoke’s Law is related to the motion of particles in a fluid.

Step 3: Conclusion Since Faraday’s Law governs the calculation of mass deposited during electrolysis, the correct answer is option (A).