Page 1 - 3. Lesson Note-Properties and Conc. of Solution

SAI International School
Subject-Chemistry

Ch-Is Matter around us pure?
Topic- Properties and concentration of solutions
LESSON NOTE

• A solution is a homogeneous mixture of two or more non reacting substances.
• The particles of solute in a solution cannot be seen by the naked eye.
• A solution does not allow beams of light to scatter.
• A solution is stable.
• The solute from a solution cannot be separated by filtration (or mechanically)

• Binary solution: It is a solution which contains only two components

Dilute and Concentrated solutions
Dilute solutions: These are the solutions which has a higher percentage of solvent
than that of solute.

Concentrated solutions: These are the solutions which contain a higher
percentage of solute than the solvent.

Concentration of a solution:
The concentration of a solution is a measure of the amount of solute that has been
dissolved in a given amount of solvent or solution.

Concentration of a solution can be expressed in different ways

Percentage method: The percentage of solute present in a solution.

Mass Percent: The concentration of solid-liquid solutions usually expressed in terms
of mass percent.

The mass percent of a solution can be defined as the mass of the solute in grams
present 100 grams of the solution.

=

Mass of solution= Mass of solute + Mass of solvent

Thus, Mass percentage can be expressed as

=
+

For example: Suppose a solution is prepared by 20g of sugar in 80g of water,
then