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OpenStudy (yrelhan4):
Hardness of water sample is due to only dissolved MgSO4. To start precipitation of MgF2, the concentration of NaF required is just more than 0.02 M. What will be hardness of water sample in ppm of CaCO3 [Given : Ksp (MgF2) at 25°C = 8 × 10–8]
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