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The hardness of water sample containing ...

The hardness of water sample containing 0.002 mol of magnesium sulphate dissolved in a litre of water is expressed as:

A

20 ppm

B

200 ppm

C

2000 ppm

D

120 ppm

Text Solution

Verified by Experts

The correct Answer is:
B
`10^6` g water contains `(0.02 xx 1000)" mol "MgSO_(4)` 1 mol `MgSO_(4) cong "1 mol CaCO"_3`
2 mol `MgSO_4 cong "2 mol CaCO"_3 i.e, 2 xx 100 gCaCO_3`
Hardness of water =200 ppm
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