Question

An aqueous solution is 1.33 m in methanol . Determine the mole fraction of water and methanol.

Answer 1

Given:

• Molality of the aqueous solution = 1.33 m

To find:

• Mole fraction of water and methanol.

Answer:

• Molecular weight of methanol, A = 32
• Molecular weight of wate, Br = 18

•     $\frac{1}{Mole Fraction of A} = 1 + \frac{1000}{Molality * Molecular wt of B}$

         ⇒ Mole Fraction of Methanol = 0.023

• Mole Fraction of water = 1 - 0.023 = 0.977