A sample of water contained 30 PPM of MgSO_(4) its hardness is x+20PPM

1.	A sample of water contained 30 PPM of MgSO_(4) its hardness is x+20PPM What is 'x'
Answer» Solution :30 ppm of `MgSO_4 to 30 gm " in " 10^6` gm of `H_2O` Hardness in TERM of `CaCO_3 to 30 XX 100/120 =2 5`ppm

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