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QJEEM20Ch1e8c: JEE Main 2020 Chemistry - Class 11 JEEM20Ch1e8c Solution: The hardness of a water sample containing 10 –3 M MgSO 4…
The hardness of a water sample containing 10–3 M MgSO4 expressed as CaCO3 equivalents (in ppm) is ______.
(molar mass of MgSO4 is 120.37 g/mol)
(molar mass of MgSO4 is 120.37 g/mol)
Step-by-Step Verified Solution
Equivalance of MgSO4 = Equivalance of CaCO3
10-3 2 = [CaCO3] 2
[CaCO3] = 10-3 M = 10-3 mol/lit
= 10-3 100 g/lit
= 100 mg/lit
= 100 ppm
10-3 2 = [CaCO3] 2
[CaCO3] = 10-3 M = 10-3 mol/lit
= 10-3 100 g/lit
= 100 mg/lit
= 100 ppm