Equivalent Mass Formula:
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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 determines the equivalent mass of a metal using the oxide formation method by measuring the volume of oxygen displaced and combined at STP.
The calculator uses the formula:
Where:
Explanation: The mass of metal is divided by the volume of oxygen displaced, then multiplied by the volume of oxygen combined at STP to determine the equivalent mass.
Details: Determining equivalent mass is fundamental in stoichiometric calculations and helps understand the combining capacity of elements in chemical reactions.
Tips: Enter the mass of metal (kg), volume of oxygen displaced (m³), and volume of oxygen combined at STP (m³). All values must be > 0.
Q1: What is STP in chemistry?
A: STP stands for Standard Temperature and Pressure (0°C and 1 atm pressure), where 1 mole of any gas occupies 22.4 liters.
Q2: Why is equivalent mass important?
A: It helps determine the combining ratios of elements in chemical reactions and is essential for stoichiometric calculations.
Q3: How accurate is this method?
A: The oxide formation method provides good accuracy when measurements are precise, especially for metals that form stable oxides.
Q4: Can this method be used for all metals?
A: It works best for metals that readily form oxides. Some noble metals may require alternative methods.
Q5: What are typical units for equivalent mass?
A: While we use kg in this calculator, equivalent mass is often expressed in grams per equivalent (g/eq) in chemical calculations.