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CBSE Class 12-science Answered

Molal elevation constant for benzene is 2.5K/m. A solution of some organic substance in benzene boils at 0.126°C higher than benzene. What is the molality of solution?

 

Asked by goyalpavitarta | 03 May, 2021, 01:27: PM
Expert Answer
Relaion between molal elevation constant and molaltiy is given as-
increment T subscript b equals m cross times K subscript b
0.126 equals 2.52 cross times K subscript b
m equals fraction numerator 0.126 over denominator 2.52 end fraction
M o l a l i t y equals space 0.05 space m o l space divided by space K g
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