Question

Define equivalent mass.

Answer 1

• The number of parts by mass, of the element which can displace or combine with 1.008 parts by mass of hydrogen or 8 parts by mass of oxygen or 35.5 parts by mass of chlorine is known as equivalent mass.
• Equivalent mass of element ‘X’ = $\frac{AtomicmassofX}{(n-factor)ValencyofX}$
• Example - Equivalent mass of Magnesium = $\frac{AtomicmassofMagnesium}{ValencyofMagnesium}$

Atomic Mass of magnesium(Mg) = 24 and its valency = 2

Therefore, the equivalent mass of Magnesium = $\frac{24}{2}=12$