What are the differences between dilution and concentration?

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Accepted Answer

Basis of Differentiation
Dilution
Concentration

Definition
Is the process of decreasing the number of solutes per unit volume of solution
Is the process of increasing the number of solutes per unit volume of solution

How it can be chaieved
Can be achieved either by adding more solvent to the solution or by removing some of the solutes
Can be achieved either by adding more solutes to the solution or by removing some of the solvent

Concentration of aqueous molecules
Contains a higher concentration of aqueous molecules
Contains a lower concentration of aqueous molecules

How it affects the color of the solution 
In colorful solutions, the more dilute the solution, the lighter the color – this is because a diluted solution contains a lesser number of solutes
In colorful solutions, the more concentrated the solution, the darker the color – this is because a concentrated solution contains a higher number of solutes

Basis of Differentiation	Dilution	Concentration
Definition	Is the process of decreasing the number of solutes per unit volume of solution	Is the process of increasing the number of solutes per unit volume of solution
How it can be chaieved	Can be achieved either by adding more solvent to the solution or by removing some of the solutes	Can be achieved either by adding more solutes to the solution or by removing some of the solvent
Concentration of aqueous molecules	Contains a higher concentration of aqueous molecules	Contains a lower concentration of aqueous molecules
How it affects the color of the solution	In colorful solutions, the more dilute the solution, the lighter the color – this is because a diluted solution contains a lesser number of solutes	In colorful solutions, the more concentrated the solution, the darker the color – this is because a concentrated solution contains a higher number of solutes

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