State the following:
Faraday’s first law of electrolysis
Faraday’s first law of electrolysis
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Solution and Explanation
Faraday's First Law of Electrolysis:
Statement:
Faraday's first law of electrolysis states that the amount of a substance deposited or liberated at an electrode during electrolysis is directly proportional to the amount of electric charge passed through the electrolyte.
Mathematical Form:
The law can be expressed as:
\(m = \frac{M \cdot Q}{F \cdot z}\)
where: - \(m\) is the mass of the substance deposited or liberated, - \(M\) is the molar mass of the substance, - \(Q\) is the total charge passed through the electrolyte (in coulombs), - \(F\) is the Faraday constant (approximately 96500 C/mol), - \(z\) is the valency of the ion (the number of electrons involved in the reaction).Implication:
This law indicates that the amount of substance deposited or liberated at the electrodes is proportional to the total charge passed, making electrolysis a controlled method for determining the quantity of material involved in redox reactions. Faraday’s first law is fundamental to understanding electroplating, electrorefining, and the electrolysis of water and salts.
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