Chemistry - Hydrogen and Its compound Question with Solution | TestHub

ChemistryHydrogen and Its compoundHydrogen and Its compoundMedium2 minQB

ChemistryMediumnumerical

Find degree of hardness of a water sample in terms of ppm of $CaCO_{3}$ if the sample contains $1 0^{- 3} M - CaCl_{2}$ and $0.05 M - NaCl$ .

Answer:

100.00

Solution:

To find the degree of hardness, we consider only the concentration of multivalent cations. NaCl does not contribute to hardness.

Concentration of Ca²⁺ from CaCl₂ = $1 0^{- 3}$ M.

Molar mass of CaCO₃ = 100 g/mol.

Hardness = $1 0^{- 3}$ mol/L $\times$ 100 g/mol $\times$ $1 0^{3}$ mg/g = 100 mg/L = 100 ppm.

Stream:JEESubject:ChemistryTopic:Hydrogen and Its compoundSubtopic:Hydrogen and Its compound

⏱ 2mℹ️ Source: QB

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