Fortification of food with iron is done using $FeSO_{4} \cdot 7 H_{2} O$ . The mass in grams of the $FeSO_{4} \cdot 7 H_{2} O$ required to achieve 12 ppm of iron in 150 kg of wheat is ____ (Nearest integer)
[Given : Molar mass of $Fe, S$ and O respectively are 56,32 and $16 g mol^{- 1}$ ]

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TestHub · Accepted Answer

​ Let mass of iron = wg ⇒ 150 × 1 0 3 w ​ × 1 0 6 = 12 ⇒ w = 150 × 12 × 1 0 − 3 = 1.8 gm ​ Let mass of FeSO 4 ​ ⋅ 7 H 2 ​ O = w 1 ​ gm ​ ⇒ Moles of Fe = 56 1.8 ​ = ( 56 + 96 + 7 × 18 w 1 ​ ​ ) ⇒ w 1 ​ = 8.935 gm ​

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