# Problem 1. The alkalinity in raw water entering a drinking water plant can decrease during sig-...

###### Question:

Problem 1. The alkalinity in raw water entering a drinking water plant can decrease during sig- nificant rainfall events. Jar tests showed an optimal alum (MW 594) dosage of 35 mg/1. If the raw water contains an alkalinity concentration of 25 mg/1 as CaCOs and a pH of 7.5, does sufficient alkalinity exist to buffer a decrease in pH?

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