- 3 Zinc Is A Toxic Metal It Can Be Removed From Water By Chemical Precipitation Of Solid Zn Oh 2 The Drinking Water St 1 (21.46 KiB) Viewed 57 times
3) Zinc is a toxic metal. It can be removed from water by chemical precipitation of solid Zn(OH)2. The drinking water st
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3) Zinc is a toxic metal. It can be removed from water by chemical precipitation of solid Zn(OH)2. The drinking water st
3) Zinc is a toxic metal. It can be removed from water by chemical precipitation of solid Zn(OH)2. The drinking water standard for zinc is 0.05 mg/L. The solubility of Zn(OH)2ts, is 5x10?M?. a) (10 p) What is the minimum pH required to reduce the dissolved Zn²+ concentration to the standard? b) (10 p) How much NaOH must be added to initially pure water to raise the pH to 11. (Express your answer as a mass concentration). c) (10 p) After chemical precipitation of drinking water is completed, the pH of the treated water must be reduced from 10-11 to near neutral. What reagent is mostly used to reduce the PH?
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