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A groundwater contains the following cations: Sodium = 43 mg/L Calcium = 55 mg/L Magnesium = 39 mg/L The total hardness (mg/L as CaCO 3

A groundwater contains the following cations:

Sodium = 43 mg/L

Calcium = 55 mg/L

Magnesium = 39 mg/L

The total hardness (mg/L as CaCO₃) is what?

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