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the hardness of a water sample (in ter...

the hardness of a water sample (in terms of Equivalents of `CaCO_(3)`) containing `10^(-3)MCaSO_(4)` Is :
(Molar mass of `CaSO_(4)=1365h mol^(-1)`)

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Hardness due to `CaCO_(3) = ( 10^(-3) xx 10^(3) ) xx 100 = 100 ` pp m
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