Answered: 4. True or False (1) Chlorine demand is…

Introduction to Chemical Engineering Thermodynamics

8th Edition

ISBN:9781259696527

Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart

Chapter1: Introduction

Section: Chapter Questions

Problem 1.1P

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Question

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 concentraMon 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 effecMve disinfectant for water and wastewater treatment.
(9) “Crown” corrosion is caused by the corrosive acMon of H2SO4.
(10) Breakpoint chlorinaMon can be used for removal of ammonia.

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