A new main is disinfected with water containing 50 mg/l of chlorine by feeding a 1.0 percent solution of chlorine to the water entering the pipe, (a) How many pounds of dry hypochlorite powder, containing 70 percent available chlorine, must be added to 40 gal of water to make a 1.0 percent solution? (b) At what rate should this 1.0 percent solution be applied to the water entering the pipe to provide a concentration of 50 mg/l?
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