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An aqueous solution of ethanol has densi...

An aqueous solution of ethanol has density `1.025 g/ mL` and it is 2 M. What is the molality of this solution ?

A

`1.79`

B

`2.143`

C

`1.951`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
`w_(B) = 2 xx 46 = 92 gm`
`w_(r) = rho xx V = 1.025 xx 1000 = 1025`
`w_(A) = 1025 - 92 = 933`
`m = (2)/(933) xx 1000 = 2.143`
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