Determination of Eqv. Mass of Metal using H2 Displacement Method given vol. of H2 displaced at STP Calculator

Formula Used:

\[ E.M_{Metal} = \frac{W}{V} \times V_{E.M} \]

Equivalent Mass of Metal (kg):

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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 calculation helps in understanding the chemical combining capacity of metals and their reactivity with hydrogen.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ E.M_{Metal} = \frac{W}{V} \times V_{E.M} \]

Where:

\( E.M_{Metal} \) — Equivalent Mass of Metal (kg)
\( W \) — Mass of Metal (kg)
\( V \) — Vol. of hydrogen displaced at STP (m³)
\( V_{E.M} \) — Vol. of Hydrogen displaced at NTP (m³)

Explanation: The mass of metal is divided by the volume of hydrogen displaced at STP to get a ratio, which is then multiplied by the volume displaced at NTP to determine the equivalent mass.

3. Importance of Equivalent Mass Calculation

Details: Determining equivalent mass is fundamental in stoichiometric calculations, understanding chemical reactions, and predicting reaction yields.

4. Using the Calculator

Tips: Enter the mass of metal in kg, volume of hydrogen displaced at STP (m³), and volume of hydrogen displaced at NTP (m³). All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between STP and NTP?
A: STP (Standard Temperature and Pressure) is 0°C and 1 atm, while NTP (Normal Temperature and Pressure) is typically 20°C and 1 atm.

Q2: Why do we measure hydrogen displacement at two different conditions?
A: Comparing volumes at different conditions helps account for temperature and pressure effects on gas volume.

Q3: What metals can this method be used for?
A: This method works for metals that react with acids to produce hydrogen gas, such as zinc, magnesium, or aluminum.

Q4: How accurate is this method?
A: The method is reasonably accurate when proper experimental conditions are maintained and measurements are precise.

Q5: Can this be used for non-metals?
A: No, this specific method is only applicable to metals that displace hydrogen from acids.