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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
=
+