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

Formula Used:

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

Equivalent Weight of Substance 2 (kg):

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

Definition: This calculator determines the equivalent weight of a second substance based on Faraday's Second Law of Electrolysis, which relates the masses of different substances deposited or dissolved during electrolysis.

Purpose: It helps chemists and electrochemists determine unknown equivalent weights when two substances are involved in electrolysis under the same conditions.

2. How Does the Calculator Work?

The calculator uses the formula:

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

Where:

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

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

3. Importance of Equivalent Weight Calculation

Details: Calculating equivalent weights is crucial for stoichiometric calculations in electrochemistry, determining molecular weights, and understanding redox reactions.

4. Using the Calculator

Tips: Enter the known equivalent weight (E1), mass of the second ion (W2), and mass of the first ion (W1). 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 passes through solutions of different electrolytes, the masses of substances deposited or dissolved are proportional to their equivalent weights.

Q2: What units should I use for mass?
A: The calculator uses kilograms, but you can use any unit as long as W1 and W2 are in the same unit.

Q3: How do I find the equivalent weight of substance 1?
A: Equivalent weight = Molar mass / n (where n is the number of electrons transferred in the half-reaction).

Q4: Does this work for any electrolytic solution?
A: Yes, as long as both substances are undergoing electrolysis under the same conditions.

Q5: Can I use grams instead of kilograms?
A: Yes, as long as all mass values use the same unit, the result will be correct.