Is Matter Around Us Pure

Is Matter Around Us Pure 

A heterogeneous mixture has a non – uniform composition

The ability of a substance to dissolve in another substance is called solubility.

Homogeneous mixture of two or more substances is called a solution.

Component of a solution present in small quantity is called a solute.

Component of a solution present in large excess is called a solvent.

Solution with high solute concentration is called concentrated solution and those with low concentration is called dilute solution

A solution that has dissolved maximum amount of solute at any particular temperature is said to be a saturated solution.

If the amount of solute contained in a solution is less than the saturation level, it is called an unsaturated solution.

The concentration of a solution is the amount of solute present in a given amount (mass or volume) of solvent or solution.

Percentage by mass is one of the methods of expressing concentration of solution

There  are two  kinds of heterogeneous mixtures, colloids and suspensions

Colloids are mixtures with particle sizes from 1 nm to 1000 nm.

The component of colloid present in small amount is called dispersed phase.

The medium in which colloidal particles dispersed or suspend themselves is called dispersion medium.

In a colloidal system particles are always suspended and do not settle down. This constant colliding of the particles in continuous motion is called Brownian movement. Scattering of a beam of light when light is passed through a colloidal solution is called the Tyndall effect 

More >>>