* Concentration is a measure of how much solute is dissolved in a given amount of solvent (or solution).

* When you add more solute, you are increasing the amount of dissolved substance in the same volume of solvent.

* This means there is now a higher ratio of solute to solvent, resulting in a higher concentration.

Think of it this way:

Imagine you have a glass of water (the solvent) and you add a teaspoon of sugar (the solute). This will create a slightly sweet solution. If you add another teaspoon of sugar, the solution becomes sweeter because the concentration of sugar has increased.

Key Point: The concentration of a solution is directly proportional to the amount of solute present. More solute = higher concentration.