Question

Mole fraction of ethanol in aq. solution is 0.4,
molality of solution is​

Answer 1

Answer:

37.03 m

Explanation:

Mole fraction of ethanol in aq. solution= 0.4 (given)

n₁= moles of ethanol

n₂= moles of water

0.4= n₁/n₁+n₂

4/10= n₁/n₁+n₂

n₁=4 and n₂= 10-4= 6

Molality (m)= moles of solute/1 kg of solvent

Solvent= 6 moles*18 gm/mol

            = 108 gms

            = 0.108 kg

m= 4/.108

  = 37.03 m