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What is the degree of hardness of a samp...

What is the degree of hardness of a sample of water containing 24mg of `MgSO_(4)` (molecular mass 120) per kg of water?

A

10ppm

B

15ppm

C

20ppm

D

25ppm

Text Solution

Verified by Experts

The correct Answer is:
C
24mg of `MgSO_(4)` present in 103 g of water
106 water will contain =24000mg of `MgSO_(4)=24` of `MgSO_(4)`
So, 24g of `MgSO_(4)=(100)/(120)xx24=20g` of `CaCO_(3)`
Hardness of water `=20ppm`
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