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The density of a solution prepared by di...

The density of a solution prepared by dissolving 120 g of urea ( mol. `"mass"= 60 u` ) in 1000 g of water is 1.15 g/mL. The molarity of this solution is :

A

`1.78 M`

B

`2.00 M`

C

`2.05 M`

D

`2.22 M`

Text Solution

Verified by Experts

The correct Answer is:
C
`V_("Sol") = ((120 + 1000))/(1.15) mL`
`M = (W_(2) xx 1000)/(Mw_(2) xx V_("sol")) = (120 xx 1000)/(60 xx 1120//1.15) = (2 xx 115)/(12) = 2.05 M`
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