Question

A solution of ethanol in water is 1.6 molal. How many grams of ethanol present in 500g of the solution?

Answer 1

Answer:

36.8 g

Explanation:

molality = no. of moles of solute/ mass of solvent (kg)

m = 1.6 (given)

mass = 500 gm

1.6 = moles of ethanol ÷ 500/1000kg

1.6/ 2 = given mass of ethanol / molar mass

0.8 × 46 = mass of ethanol

mass of ethanol = 36.8 g