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Question

0.450 g of urea (mol.wt. 60) in 22.5 g of water show 0.170oC of elevation in boiling point. The molal elevation constant of water is :

Options

A.0.051oC
B.0.51oC
C.5.1oC
D.0.83oC

Solution

ᐃT = Kb
0.170 = Kb
Kb = = 0.51oC

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