4. True or False (1) Chlorine demand is the difference between total chlorine and free chlorine (2) In raw wastewater samples, most of nitrogen is in the form of nitrate. (3) If 10 mg/L of NH3-N is converted to nitrate, the nitrate concentration is 10 mg/L as N. (4) Free chlorine consists of hypochlorous acid and hypochlorite. (5) Chloramines is a weaker disinfectant than free chlorine.
4. True or False (1) Chlorine demand is the difference between total chlorine and free chlorine (2) In raw wastewater samples, most of nitrogen is in the form of nitrate. (3) If 10 mg/L of NH3-N is converted to nitrate, the nitrate concentration is 10 mg/L as N. (4) Free chlorine consists of hypochlorous acid and hypochlorite. (5) Chloramines is a weaker disinfectant than free chlorine.
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter20: Environmental Chemistry-earth's Environment, Energy, And Sustainability
Section: Chapter Questions
Problem 41PS
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Transcribed Image Text:4. True or False
(1) Chlorine demand is the difference between total chlorine and free chlorine
(2) In raw wastewater samples, most of nitrogen is in the form of nitrate.
(3) If 10 mg/L of NH3-N is converted to nitrate, the nitrate concentration is 10 mg/L as N.
(4) Free chlorine consists of hypochlorous acid and hypochlorite.
(5) Chloramines is a weaker disinfectant than free chlorine.
(6) Na2HPO4 contributes to the orthophosphates.
(7) For phosphorus analysis, the purpose of the autoclave is to kill the phosphorus bacteria
which interferes colorimetric analysis.
(8) Chloride is an effective disinfectant for water and wastewater treatment.
(9) "Crown" corrosion is caused by the corrosive action of H₂SO4.
(10) Breakpoint chlorination can be used for removal of ammonia.
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