Question 2050 of 223 · California Water Treatment Operator Exam
Which chemical is generally added to water after filtration to raise the pH and reduce corrosion?
Exactly one answer is correct.
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Correct answer to question 2050
- A: Sodium hydroxide or lime
Explanation
Caustic soda, lime or soda ash raise pH and alkalinity. Chlorine gas and alum both lower pH.
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