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 oxide formation method, which is important in stoichiometric calculations and chemical analysis.

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)
• \( M \) — Mass of Oxygen displaced (kg)
• \( E.M_{Oxygen} \) — Equivalent Mass of Oxygen (8g = 0.008kg)

Explanation: The ratio of metal mass to oxygen mass is multiplied by oxygen'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 calculating chemical equivalents in reactions.

4. Using the Calculator

Tips: Enter the mass of metal, mass of oxygen displaced (both in kg), and equivalent mass of oxygen (default 0.008kg). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the standard equivalent mass of oxygen?
A: The equivalent mass of oxygen is 8 grams (0.008 kg) as it combines with hydrogen in a 1:8 ratio by mass to form water.

Q2: How is mass of oxygen displaced measured?
A: It's determined experimentally by measuring the mass of oxygen that combines with a known mass of metal to form its oxide.

Q3: Why is equivalent mass important?
A: It helps in determining combining ratios of elements and is fundamental in stoichiometric calculations.

Q4: Can this method be used for all metals?
A: Yes, for metals that form stable oxides under experimental conditions.

Q5: What units should I use?
A: The calculator uses kilograms for consistency, but you can use grams as long as all masses are in the same unit.