Question

Gram equivalent weight of FeSO4.7h20

Answer 1

Eq. Wt. = molar mass / n factor
Molar mass 278 and n factor = 2
So Eq. wt. comes out to be 278/2 = 139 units.

Answer 2

The gram equivalent weight is 139 grams

Explanation:

“Gram equivalent weight” is the weight in grams of the substance which either combines with or equal to 8 grams of oxygen or 1 gram of hydrogen. In other words, “gram equivalent weight” is the mass of the substance in grams which can either combine or displace with a quantity which is fixed with other substance.

Gram equivalent weight is given simply by dividing the atomic weight or molecular weight by the valency.  

The atomic weight of $FeSO_4,7H_2O$ is 278gm

The valence of $FeSO_4,7H_2O$ is 2  

So, the gram equivalent weight is

$=\frac{278}{2}$

$=139 \ grams$