23. ____
A substance characterized by an excess
g. Hydrochloric acid
h. Hypochlorous acid
24. ____
A substance with an equal number of
i.
Hypochlorite ion
25. ____
The portion of chlorine that remains
uncombined with matter in the pool water.
26. _____ One of the acids formed when chlorine is
added to water. It is useless as a disinfecting
agent.
27. _____ The amount of chloramines in pool water.
28. _____ One of the compounds formed when chlorine
is added to water. It kills bacteria rather slowly.
29.
The best pH range for swimming pools is _______________________.
30.
Which of the following is NOT a true effect of pH on swimming pool operations?
a. A pool with a pH of 7.6 to 8.0 causes the least eye irritation.
b. It takes more chlorine to kill bacteria at a high pH level.
c.
A high pH encourages the growth of algae.
d. A pH of 7.0 or below can corrode metal pipes and dissolve mortar and
concrete.
MD0166
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