Calculate the equivalent mass of hydrated ferrous sulphate.

Explanation

Hydrated ferrous sulphate = `FeSO_(4)*7H_(2)O`
Ferrous sulphate - Reducing agent
Ferrous sulphate reacts with an oxidising agent in acid medium according to the equation.
` 2FeSO_(4) + H_(2)SO_(4) + [O] rarr Fe_(2)(SO_(4))_(3) + H_(2)O`
16 parts by mass of oxygen oxidised 304 g of `FeSO_(4)` .
8 parts by mass of oxygen will oxidise `304/16 xx 8` parts by mass of `FeSO_(4)` .
= 152
Equivalent mass of Ferrous sulphate (Anhydrous) = 152
Equivalent mass of crystalline Ferrous sulphate `FeSO_(4) .7H_(2)O`
= 152+ 126 = 278