Concentration of a solution : Let us take two separate beakers filled each with approximately 50 ml of water. The first beaker add salt and keep stirring continuously. To the second beaker add sugar or barium chloride and also keep stirring continuously. When the solute is dissolved up to its capability then, start heating the contents of the beaker. Now again add the solute again.

Does the amount of solute can be dissolved same in both beakers at given temperature?

At any particular temperature if the solute is dissolved as much as it capable of dissolving, then such solution is called as saturated solution. Or At any particular temperature when no more solute can be dissolved in the solution then it is called as saturated solution. At any particular temperature the amount of solute in the saturated solution is called as solubility of the solution. At any given temperature if the amount of solute is less than the saturation level, then it is called as unsaturated solution. We can observe, in the above activity at any particular temperature the solubility of different substances is different. Therefore the concentration of the solution is the amount of solute present in given amount or given mass or given volume of the solution. Or The amount of solute dissolved in given mass or given volume of the solvent.

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