Solution || Solute || Solvent || CH 02 || Matter || Federal Board New Edition
2.4 Solution
A solution is a homogeneous mixture of two or more substances in which one substance is dissolved in the other. Homogeneous means that no particles or parts of different substances can be seen. When one substance dissolves, the solution looks exactly the same. A substance that is dissolved is called a solute and a substance in which it is dissolved is called a solvent. In solution, the particles are microscopic, less than 1 nm diameter. A solution is a very stable mixture and the solute does not separate from the solvent itself.
In salt solution, salt is the solute and water is solvent. More than one solute may be present in a solution. For example, in soft drinks, water is a solvent while other substances like sugar, salts and CO, are solutes. Consider the example of air where Nitrogen gas is solvent and Oxygen, carbon dioxide and trace gases are solute. On the basis of physical states of solvent and solute can be categorized as solid, liquid and gaseous solutions. Generally, solutions are found in three physical states depending upon the physical state of the solvent, e.g. air is a gaseous, sea water is a liquid solution and alloy is a solid solution in real life.
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