Question

20 g solute is present in 200 mL solvent. The
density of solvent is 0.9 g/mL. What is the weight
fraction and weight percent of the solute?
(1) 0.1 and 10
(2) 0.2 and 20
(3) 0.3 and 10
(4) 0.2 and 30​

Answer 1

The solute's weight fraction and weight percent is (1) 0.1 and 10

Explanation:

• Solutions are homogeneous mixtures of one or more solutes in a solvent. A solvent is a liquid that makes up the majority of a solution, whereas a solute is a material dissolved inside it.

Mass of solute = 20 gm

Mass of solvent = 200 ml

For finding Volume percent;

$Volume Percent=\frac{Volume of Solute}{Volume of Solution}\times100\%$

Therefore,

$\frac{20 gm}{200 ml}\times100\%=10$