Question

The equivalent weight of Mohr's salt having formula FeSO₄. (NH₄)2SO₄. 6H₂O is equal to

(a) molecular weight

(c) equivalent weight

(b) atomic weight

(d) equivalent as well as molecular weight

Answer 1

Correct option is (a) molecular weight

In redox reactions, oxidation number of Fe is changed from +2 (FeSO₄) to +3 (Fe³⁺).

Hence, Eq. wt. of Mohr's salt \(\frac{\text{Mol. wt.} }{3 - 2}\) = Mol. wt.