C&EE 153 Quiz: Homework 1
9 Jan 2019
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Due: thursday, october 12, before the start of the class. (no late submission accepted, unless otherwise approved earlier) Problems to be solved in the discussion class: Q5. (chapter 2, problem # 2. 32) chapter/two problems (a) during drinking water treatment, 17 lb of. 2. 1 chlorine are added daily to disinfect 5 million gallons of water. What is the aqueous concentration of chlo rine in mg/l? (b) the chlorine demand is the concen tration of chlorine used during disinfection. The chlorine residual is the concentration of chlorine that remains after treatment so the water maintains its disinfecting power in the distribution system. 2. 2 a water sample contains 10 mg n03-/l. What is the concentration in (a) ppmm, (b) moles/l, (c) mg. 2. 3 a liquid sample has a concentration of iron (fe) of 5. 6 mg/l. The density of the liquid is 2,000 g/l. 2. 4 coliform bacteria (e. g. , escherichia coli) are excreted in large numbers in human and animal feces.
