شرح درس
Mixtures Properties
CHEMISTRY - Secondary 1
In This part we will study
Tendal's phenomenon
To distinguish between the colloid and the true solution, this is known as Tendal's phenomenon.
By allowing a beam of light from a lamp to fall on each one, the colloid scatters the light
because the size of the colloid particles is larger enough.

Colloidal systems:

Colloidal systems consist of:
Dispersed phase (like the solute in the solution).
It is the substance that forms the colloidal particles.

Dispersed medium (like the solvent in the solution).
It is the medium in which the colloidal particles are dispersed.


Application
When an amount of egg white is whipped by an electric hand mixer,
a colloidal system (gas in liquid type) is formed.
There is no gas-gas colloidal system.
Because mixed gases are homogeneous mixtures, whereas the colloid is a heterogeneous mixture.

Method of separating the mixture
Among the methods of separating the mixtures are:
 Filtration:
* Separating the components of a mixture of solid substances, some of them are soluble, and some are insoluble by using a filtration funnel and a filter paper.
* Example separating of sand from table salt in their mixture using water as a solvent.

Evaporation
* Separating a solid substance dissolved in a solution by heating.
* Example separating of table salt from its solution by heating till complete evaporation of water

 Simple distillation:
* Separating the solvent from a solution by heating and condensation.
* Example separating pure water from a salty solution by evaporation, the condensation of the produced vapour

Best wishes to you
Mr.Ahmed Elbasha

كيمياء الصف الاول الثانوي لغات - الفصل الدراسي الاول
شرح كيمياء لغات اولي ثانوي - مستر احمد الباشا
كيمياء لغات - الصف الاول الثانوي - كيمياء اولي ثانوي الترم الاول - كيمستري اولي ثانوي الترم الاول