Concepts Of Physics MCQ Edition [Volume 2]PhysicsThermal and Chemical Effects of Electric Current
The electrochemical equivalent of a material is dependent upon
Options
- Athe current passing through the electrolyte that contains the material
- Bthe nature of the material
- Cthe total amount of charge transferred through the electrolyte
- Dthe quantity of this material present within the electrolyte
Correct answer
B. the nature of the material
Step-by-step solution
According to Faraday's first law of electrolysis, the mass m of a substance deposited at an electrode is given by m = ZQ , where Q is the charge and Z is the electrochemical equivalent. The electrochemical equivalent Z is defined as the mass of the substance deposited by one coulomb of charge. It is given by the relation Z = E F , where E is the equivalent weight of the substance and F is Faraday's constant. Since the equivalent weight depends on the atomic weight and valency of the substance, the electrochemical e