Certified Professional In Patient Safety (CPPS) Practice Exam

One grain per gallon of hardness is approximately equal to:

100 mg/L as CaCO3 5.0 mg/L as CaCO3 17.1 mg/L as CaCO3 1.0 mg/L as CaCO3

17.1 mg/L as CaCO3

One grain per U.S. gallon is approximately 17.1 mg/L as CaCO3.

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