The atomic weight of Magnesium (Mg) is about 24.305 g /
mol.
Magnesium when forms an ion can donate two electrons hence
forming Mg2+. Since it can donate two electrons, therefore it has an
equivalence of 2 equivalence per mole, therefore:
equivalent weight = (24.305 g / mol) * (1 mol / 2
equivalence)
equivalent weight = 12.1525 g / equivalence
