Question

If boiling point elevation for a solution is 7.21 K and its Kb is 2.77 K kgmol-1, Calculate molality of the solution ​

Answer 1

Answer:

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Answer 2

Given:

Boiling point elevation for a solution is 7.21 K and its Kb is 2.77 K kgmol-1

To Find:

Molality of the solution ​

Solution:

We know from the boiling point elevation formula-

ΔTb= kb × m

ΔTb = Change in boiling point

kb = molal elevation constant

m = molality

ΔTb = 7.21 K

Kb = 2.77 K kgmol-1

m=?

ΔTb =  kb × m

7.21 = 2.77 × m

m = 2.6028 molkg-1