Look at the following table:Non-carbonate hardness92 mg/L as CaCO3Total magnesium15 mg/LAlkalinity68 mg/L as CaCO3Desired Total hardness in water80 mg/L as CaCO3Residual carbonate hardness (can not be removed)35 mg/L as CaCO3 Calculate the amount of magnesium hardness (in mg/L as CaCO3)?

Look at the following table:Non-carbonate hardness92 mg/L as CaCO3Tota

1.	Look at the following table:Non-carbonate hardness92 mg/L as CaCO3Total magnesium15 mg/LAlkalinity68 mg/L as CaCO3Desired Total hardness in water80 mg/L as CaCO3Residual carbonate hardness (can not be removed)35 mg/L as CaCO3 Calculate the amount of magnesium hardness (in mg/L as CaCO3)?
A.	31.25 mg/L as CaCO3
B.	3.12 mg/L as CaCO3
C.	10 mg/L as CaCO3
D.	100 mg/L as CaCO3
Answer» B. 3.12 mg/L as CaCO3

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Look at the following table:Non-carbonate hardness92 mg/L as CaCO3Total magnesium15 mg/LAlkalinity68 mg/L as CaCO3Desired Total hardness in water80 mg/L as CaCO3Residual carbonate hardness (can not be removed)35 mg/L as CaCO3 Calculate the amount of magnesium hardness (in mg/L as CaCO3)?

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