This document summarizes the key characteristics of true solutions, colloids, and suspensions. A true solution fully dissolves particles smaller than 1 nm that do not settle out and do not scatter light. A colloid partially dissolves 1 nm to 100 nm particles that do not settle but can scatter light in a phenomenon called the Tyndall effect. A suspension does not dissolve larger than 100 nm particles that do settle out and can reflect light.

1. CONSOLIDATED
CHARACTERISTICS
OF SOLUTIONS

2. TRUE SOLUTION
 solute is fully dissolved.(sugar solution)
 Size of particle -< 1 nm.
Ability to settle down – does not settle down.
When light passes through –path of light
cannot be seen. Because the particles cannot
scatter the light.

3. COLLOID
 Solute is partially dissolved. (milk solution)
Size of particle -1 nm- 100 nm.
Ability to settle down –does not settle down.
When light passes through path of the light can
be seen. Because the particles can scatter the
light. The phenomenon of scattering of light by
colloidal particles is called Tyndall effect.

4. SUSPENSION
 Solute does not dissolve. (chalk powder solution)
Size of particle -> 100 nm.
Ability to settle down – settles down.
When light passes through path of the light can
be seen. Because the particles can reflect light.

5. Thank you
Sivakrishna C A