Q. A water sample analysis data is given below.
| Ion | Concentration, mg/L | Atomic Weight |
| Ca2+ | 60 | 40 |
| Mg2+ | 30 | 24.31 |
| HCO3- | 400 | 61 |
The carbonate hardness (expressed as mg/L of CaCO3, up to one decimal place) for the water sample is
Ans: 272.0 – 274.0
Sol:
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