A ferric chloride dosage of 40 mg/l and an equivalent dosage of lime are used to coagulate a water.
(a) How many pounds of ferric chloride per million gallons are used?
(b) How many pounds of hydrated lime per million gallons are used, assuming a purity of 70 % CaO?
(c) How many pounds of ferric hydroxide are theoretically produced per million gallons of water treated?