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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

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answer is 4.97.

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Detailed Solution

FeSO4.7H2O         10=x100×103×106i.e. x= 1gm            No. of moles of Fe=155.85 No. of moles of FeSO4.7H2O=155.85Amount of   FeSO4+H2O=155.8555.85+016+18×7=4.97gms
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