The equivalent mass, also known as the gram equivalent mass or equivalent weight, is a term used in stoichiometry to represent the amount of a substance that reacts or combines with one mole of another substance. It is typically expressed in grams.
To calculate the equivalent mass of a divalent element, you need to determine the number of moles of the element that corresponds to its atomic mass. Since the atomic mass is given as 65.30, which represents the mass of one mole of the element, the equivalent mass will be half of that value.
Equivalent mass = Atomic mass / Valency
For a divalent element, the valency is 2.
Therefore, the equivalent mass of the divalent element with an atomic mass of 65.30 is:
Equivalent mass = 65.30 / 2 = 32.65 grams per equivalent (g/eq)