Difference Between Dilution and Concentration

Dilution vs Concentration

The concepts of dilution and concentration are very significant in the study of solutions in chemistry. The amount of solute in a solvent decides the properties of a solution and this amount remaining the same, the solution can be made diluted or concentrated by adding solvent and removing some of the solvent from the solution. In chemical analysis, it is often required to change the concentration of a solution.

Dilution refers to addition of solvent whereas concentration refers to removal of solvent. Addition decreases the concentration of the solute in the solution whereas removal increases its concentration. Remember, whether going in for dilution or concentration, the amount of solute remains the same in the solution. Now, we know that there is a measure for calculating the concentration of a solute in a solution known as molarity which is the number of moles of the solute per liter of the solution. As the number of moles of the solute remains the same in the processes of dilution and concentration, the product of the molarity of the solution and its volume in liters

M x V= Moles of the solute

Thus moles of solute remaining constant, M x V has to be same before and after we have added or removed the solvent. This means that

M1 x V1= M2 x V2

This is referred to as dilution equation and makes it easy to calculate the volume of solvent to be added or removed for the desired concentration. While it is easy to add solvent, removal often requires addition of heat to vaporize the solvent. Here, care is taken to ensure the properties of solute are not affected in the process of giving heat to the solution.

In brief:

Concentration vs Dilution

• Dilution and concentration are significant in the analysis of solutions in chemistry.

• Dilution needs addition of solvent while concentration refers to removal of solvent.

• The volume of solvent needed for addition or removal can be easily calculated using the dilution equation.