12.3 Chemical Oxidant Demand Flashcards
1
Q
the difference between the amount of chlorine added and the amount of free, combined or total chlorine remaining at the end of the contact period
A
chlorine demand
2
Q
chlorine demand is a function of water quality characteristics, _____, water ______________, amount of _______ applied, _________ of contact
A
pH, temperature, oxidant, time
3
Q
what is produced when significant amounts of ammonia in the water react with chlorine?
A
unpleasant taste and odor
4
Q
process which removes taste and odor by addition of chlorine
A
breakpoint chlorination
5
Q
what is the molar Cl2:NH3 ratio when the breakpoint is reached?
A
2:1
6
Q
what is produced when chlorine is added after the breakpoint?
A
free chlorine
