A sample of well water contains 140 gm m3 Ca2+ ions...

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A sample of well water contains 140 gm/m³ Ca²⁺ ions and 345 gm/m³ Na⁺ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO₃ in gm/m³ is (assuming atomic masses of Ca : 40, Na : 23, C : 12, O : 16)

A. 350

B. 485

C. 140

D. 345

Answer: Option A

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Otsoga John:

4 years ago

How, please show the working
Himanshu Singh:

7 years ago

How

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