1.

10^(5)g of a sample of water contained 16.2 8 of Ca(HCO_(3))_(2) Its hardness is

Answer»

200 ppm
300 ppm
60 ppm
100 ppm

Solution :Hardness in temrs of
`Ca(HCO_(3))_(2)=16.2xx(100)/(162)=10g`
degree of hardness `=(10)/(10^(5))xx10^(6)=100 ppm`


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