How To Calculate Equivalent Weight?

Equivalent weight = Molar mass / n-factor

For acids: Equivalent weight = Molecular mass / basicity

For bases: Equivalent weight = Molecular mass / acidity

For salts: Equivalent weight = Molecular mass / total positive or negative charge

For oxidation-reduction substances: Equivalent weight = Molar mass / number of electrons transferred

For elements: Equivalent weight = Atomic mass / valency

Determine the n-factor first

Divide the molar or atomic mass by the n-factor

Use the specific reaction to find the correct n-factor