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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:
![](https://www.gkseries.com/blog/wp-content/uploads/2023/09/Screenshot-927.png)