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Definition: This calculator determines the equivalent weight of a substance based on Faraday's Second Law of Electrolysis, which relates the masses of different elements deposited or dissolved at electrodes to their equivalent weights.
Purpose: It helps chemists and electrochemists determine unknown equivalent weights when the masses of substances involved in electrolysis are known.
The calculator uses the formula:
Where:
Explanation: The formula shows that the equivalent weights of substances are directly proportional to the masses of ions liberated or deposited during electrolysis.
Details: Calculating equivalent weights is crucial in stoichiometric calculations, electrochemistry, and determining molecular formulas of compounds.
Tips: Enter the known equivalent weight (E2), and the masses of both substances (W1 and W2) in kilograms. All values must be > 0.
Q1: What is Faraday's Second Law of Electrolysis?
A: It states that when the same quantity of electricity is passed through different electrolytes, the masses of substances deposited or dissolved are proportional to their equivalent weights.
Q2: What are typical units for equivalent weight?
A: Equivalent weight is typically expressed in grams per equivalent (g/eq) or kilograms per equivalent (kg/eq).
Q3: How do I find the equivalent weight of substance 2?
A: The equivalent weight can be calculated as molecular weight divided by the valency (n-factor) of the substance.
Q4: Can this calculator be used for any electrolysis reaction?
A: Yes, as long as you know the masses of substances involved and at least one equivalent weight.
Q5: Why is equivalent weight important in electrolysis?
A: It helps determine the amount of substance that will be deposited or dissolved when a certain amount of charge passes through the electrolyte.