How will you calculate equivalent mass from molecular mass?

Explanation

The equivalent mass can be calculated from the molecular mass as follows:
For acid : Equivalent mass of acid `=("Molecular mass")/("Basicity")`
For base: Equivalent mass of base `=("Molecular mass")/("Acidity")`
For salt: Equivalent mass of salt `=("Molecular mass")/("Total charge on cationic part")`