What is Solution?
A solution is a homogeneous mixture of two or more than two substances whose particle size is 0.1nm -1nm. Homogeneous means that the components of the mixture form a single phase.
You must have seen many types of solutions in general such as soda water, sharbat, salt solution etc. You would have seen brass utensils as well which are also homogeneous solution of solid into solid. We can prepare solutions of solid-liquid, solid-solid, solid-gas, liquid-solid, liquid-liquid, gas-solid, gas-liquid and gas-gas. Gasoline, alloys, air, starch solution etc. are examples of solutions.
Solutions consists of -Solute and Solvent. Let’s discuss solute and solvent in detail.
Solute – The substance which is being dissolved in solvent to form a solution is called a solute. It is present in lesser quantity than solvent in the solution.
Solvent – The component of a solution in which solute is being dissolved is called a solvent. It is present in more quantity than solute in solution.
For example - If we take a solution of salt-water. Then in this solution salt is solute and water is a solvent as salt is being dissolved in water and salt is present in lesser quantity than water in the solution.
Thus, we can say solvent forms a major proportion of the solution.
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Sugar-water, salt solution, brass, alloys, alcohol in water, aerosol, air, aerated drinks such as Coca-Cola etc. are the examples of solutions. When we work with chemistry, we generally prepare many types of solutions such as copper in water, iodine in alcohol etc.
Solutions can be divided into following types of the basis of quantity of solute in a solution –
Unsaturated Solution – The solution in which still we can add more solute at a given temperature is called unsaturated solution.
Saturated Solution – The solution in which we cannot dissolve more solute in the solvent at a given temperature is called saturated solution.
Supersaturated Solution – The saturated solution in which we add more solute by raising the temperature or pressure is called a supersaturated solution. In these solutions generally crystals start forming.
Solutions can be divided into following types of the basis of amount of solvent added-
Concentrated Solution – The solution in which solute is present in large quantity is called a concentrated solution.
Dilute Solution – it has very small amount of solute in large quantity of solvent.
A solution possesses following properties –
A solution is a homogeneous mixture.
The constituent particles of a solution are smaller than 10-9 metre in diameter.
Constituent particles of a solution cannot be seen by naked eyes.
Solutions do not scatter a beam of light passing through it. So, path of the light beam is not visible in solutions.
Solute particles cannot be separated by filtration.
Solute or solvent particles do not settle down when left undisturbed.
Solutions are stable at given temperature.
Concentration of a solution refers to the amount of solute present in a given amount of solution. Amount of solute can be represented by its mass or volume. Concentration of a solution can be represented by various ways. Here we are providing you following three ways –
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