Question

$1g$ equivalent of a substance is the weight of that amount of a substance which is equivalent to:

Answer 1

Gram equivalent mass is mass of one mole of element, molecule, ion divided by their valency or number of electrons shared.

It's generally defined for either salts or metals or ions or basically compounds/atoms/molecules which can form ions.

For example, molar mass of ${AlCl}_3$ is 133.34 g/mol. Whereas its equivalent mass would be $\frac{133.34}{3}=44.4467g/eq.$