Question

100ml of solution contains 8g of solute of molecular weight 80 and density of solution is 1.08g/ml.Find the molality and mole fraction

Answer 1

given,

volume of solution= 100ml

weight of solute=8g

molecular weight of solute= 80g

density of solution=1.08g/ml

ANSWER:

mass of solution= density of solution*volume of the solution

= 1.08*100=108g=

mass of solvent= mass of solution-mass of solute

=100g

= no. of moles of solute = given mass/ molecular mass

=8/80 = 1/10= 0.1 mol

molality= no. of moles/ mass of solvent

0.1/100

molality= 0.001molal

........

Answer 2

here's the answer and hope this helps you.