COLLOIDS AND COLLOIDAL SOLUTIONS



COLLOIDS AND COLLOIDAL SOLUTIONS

The word colloids is of Greek origin; the Greek word Kolla, meaning “glue”. Thomas Grahm is usually regarded as the Confider of Colloid Science. The subtance like  glue, gelatin, starch etc. when added to water, form a solution which cannot pass through the animal membrane or semi-permeable membrane are called colloids. The resulting solution is called colloidal solution.

COLLOIDAL SOLUTION

It is defined as a heterogeneous system consisting of two phases.

(1) A dispersed phase consisting of the colloidal particles and

(2) A dispersion medium in which the dispersion of the particles takes place and it forms the major portion of the solution. The particles of the colloidal solutions can pass through an ordinary filter paper but not through an animal membrane. It is obviously impossible to draw a boundary line between true solutions and colloidal solutions.

Examples: Dispersion of oil in water and dispersion of Arsenic sulphide in water forms colloidal solutions.

About Saweel Ur Raheem

Check Also

2nd Year Chemistry Notes : Short Questions Chapter 11

Chapter 11 “ Alkohols,Phenols and Ethers” Past Papers Short Questions Solved of Bahawalpur Board,DG Khan ...

© Copyrights 2014. All rights are reserved www.latestcontents.com