The ionic concentration of a mine water sample with pH close to 7.0 is given below. The alkalinity of the water expressed as equivalent CaCO, in mg/l, (rounded off to two decimal places) is ______.
| Cations | mg/l | Anions | mg/l |
|---|---|---|---|
| Ca²⁺ | 95.0 | HCO₃⁻ | 160.0 |
Min: 131.1 Max: 131.2
Answer: 131.15
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