Classification Of Solutions
Pollution of air and water of Class 8
Classification Of Solutions:
Depending on the physical states of the solute and the solvent, solutions can be classified into various types.
|Solid||Alloys of metals|
|Solid||Liquid||Hydrated crystalline salts|
|Gas||Hydrogen gas adsorbed on platinum or palladium|
|Solid||Common salt in water|
|Liquid||Liquid||Petrol in kerosene|
|Gas||Aerated water or soft drinks|
When the solvent is a gas and the solute is a solid or a liquid, the resultant mixture becomes heterogeneous. All other solutions being homogeneous are called true solutions. The other two types of mixtures being heterogeneous are called suspensions. e.g. fog, mist, dust particles in air.
The study of solutions is generally confined to the solutions of solid solute in liquid solvent.
In most of the cases, water is taken as the solvent since it can dissolve a wide range of chemical compounds. Those solutions in which water is taken as the solvent are called aqueous solutions. Apart from water, other liquids can also be taken as solvents. Examples of such solvents are alcohol, petrol, ether, benzene etc. Those solutions in which a liquid other than water is taken as solvent are called non aqueous solutions.
Aqueous solutions can be further classified on the basis of relative proportions of a solute in the solution.
The solution in which there is a small amount of solute dissolved in a given mass of a solvent is called dilute solution.
The solution containing a relatively large amount of solute dissolved in a given mass of a solvent is called concentrated solution.