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0.9 g urea when dissolved in 45 g water ...

0.9 g urea when dissolved in 45 g water caused elevation of `0.17^(@)C` in b.p. Calculate molecular elevation constant of water.

Text Solution

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`Delta T_B=K_B times (w_1 times 1000)/(w_2 times M_1)`
`K_b=(Delta T_b times w_2 times M_1)/(w_1 times 1000)`
`=(0.17 times 45 times 60)/(0.9 times 1000)`
`=0.51 K kg mole^-1`
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