Equivalent Weight of First Element by Faraday's Second Law of Electrolysis Calculator

Formula Used:

\[ E_1 = E_2 \times \left( \frac{W_1}{W_2} \right) \]

Equivalent Weight of Substance 1:

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1. What is Equivalent Weight by Faraday's Second Law?

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.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ E_1 = E_2 \times \left( \frac{W_1}{W_2} \right) \]

Where:

\( E_1 \) — Equivalent weight of substance 1 (kg)
\( E_2 \) — Equivalent weight of substance 2 (kg)
\( W_1 \) — Mass of ions 1 (kg)
\( W_2 \) — Mass of ions 2 (kg)

Explanation: The formula shows that the equivalent weights of substances are directly proportional to the masses of ions liberated or deposited during electrolysis.

3. Importance of Equivalent Weight Calculation

Details: Calculating equivalent weights is crucial in stoichiometric calculations, electrochemistry, and determining molecular formulas of compounds.

4. Using the Calculator

Tips: Enter the known equivalent weight (E2), and the masses of both substances (W1 and W2) in kilograms. All values must be > 0.

5. Frequently Asked Questions (FAQ)

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.