Ferrous sulphate heptahydrate is used to fortify foods with

Question

Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in grams) of the salt required to achieve 10 ppm of iron in 100 kg of wheat is _______.
Atomic weight : Fe = 55.85; S = 32.00; O = 16.00

DivineJEE · Accepted Answer

FeSO_(4).7H_(2)O (M = 277.85) PPM = Mass of Iron Mass of wheat x 10^(6) => 10 = Mass of Iron 100 x 10^(3) x 10^(6) => Mass of Iron = 1 gm Molecular mass of FeSO_(4).7H_(2)O is 277.85 55.85 gm iron is present in 277.85 gm of salt 1 gm iron is present in = 277.85 / 55.85 = 4.97 gm of salt.

Explanation

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