* Concentration is a measure of how much solute (the substance being dissolved) is present in a given amount of solvent (the substance doing the dissolving).
* Adding more solvent means you're increasing the total volume of the solution.
* The amount of solute remains the same.
* Since the solute is spread out over a larger volume, the concentration (solute per unit volume) decreases.
Think of it like this: Imagine you have a cup of tea. The tea leaves represent the solute, and the water represents the solvent. If you add more water to the cup, the tea becomes less concentrated because the same amount of tea leaves is now spread out in a larger volume of liquid.
