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One litre hard water contains 12.00 mg M...

One litre hard water contains 12.00 mg `Mg^(2+)` millieqivalent of washing soda required to remove its hardness is

A

1

B

12.15

C

`1xx10^(-3)`

D

`12.15 xx 10^(-3)`

Text Solution

Verified by Experts

The correct Answer is:
A
Meq of `Mg^(+2)` = Meq of washing soda
`(W)/(E ) xx 1000 = Mg^(+2) , EW = (24)/(2) = 12`
` (12 xx 10^(-3))/(12) xx 1000 = 1`
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