What is the total hardness of water in mg/L if the concentration of Ca – McqOptions

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1.	What is the total hardness of water in mg/L if the concentration of Ca and Mg are 56.7 mg/L and 9.8 mg/L?
A.	182.1
B.	66.5
C.	133
D.	91.05
Answer» B. 66.5

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