Ferrous sulphate heptahydrate is used to fortify foods with iron. The amount (in grams) of the salt required to achieve 10 p p m of iron in 100 k g of wheat is ____________. Atomic weight: F e = 55.85 ; S = 32.00 ; O = 16.00

Step-by-step solution

Formula of ppm is as follow- ppm = weight   of   solute weight   of   solution × 10 6 10 = M a s s   o f   F e ( i n g ) 100 × 1000 × 10 6 Or mass fe = 1 g F e S O 4 . 7 H 2 O M = 278 56g in 1 mole 1 g - 1 56 m o l e 1 56 × 278 g = 4.96 g PPM is a concentration term and its full form is "parts per million" and it also can be expressed as milligrams per liter (mg/L). This measurement is the mass of a chemical or contaminate per unit volume of water.