1. What is Equivalent Mass of Metal?

Definition: Equivalent Mass of Metal is the number of parts by mass of an element which can displace/combine with 1.008 parts by mass of hydrogen or 8 parts by mass of oxygen or 35.5 parts by mass of chlorine.

Purpose: This calculator helps determine the equivalent mass of a metal using the chloride formation method, which is fundamental in stoichiometric calculations.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( E.M_{Metal} \) — Equivalent Mass of Metal (kg)
• \( W \) — Mass of Metal (kg)
• \( M_{reacted} \) — Mass of Chlorine reacted (kg)
• \( E.M_{Cl} \) — Equivalent Mass of Chlorine (35.5 g or 0.0355 kg)

Explanation: The mass ratio of metal to chlorine is multiplied by chlorine's equivalent mass to determine the metal's equivalent mass.

3. Importance of Equivalent Mass Calculation

Details: Equivalent mass is crucial for understanding chemical reactions, determining stoichiometric ratios, and predicting reaction yields.

4. Using the Calculator

Tips: Enter the mass of metal, mass of chlorine reacted, and equivalent mass of chlorine (default 0.0355 kg). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Why is chlorine used in this method?
A: Chlorine has a well-defined equivalent mass (35.5 g) and reacts readily with most metals, making it ideal for these calculations.

Q2: How do I determine the mass of chlorine reacted?
A: Subtract the initial mass of metal from the final mass of metal chloride formed.

Q3: What if my metal doesn't form a chloride?
A: This method only works for metals that form chlorides. For others, use hydrogen displacement or oxide formation methods.

Q4: Why is the equivalent mass of chlorine 35.5 g?
A: Chlorine's atomic weight is 35.5 g/mol and its valency is 1, so its equivalent mass is 35.5 g/equivalent.

Q5: Can I use grams instead of kilograms?
A: Yes, but be consistent with all units (all in grams or all in kilograms).