Here's a breakdown:

* pH scale: The pH scale measures the acidity or alkalinity of a solution. It ranges from 0 to 14.

* Acids: Acids have a higher concentration of hydrogen ions (H+) than hydroxide ions (OH-). This makes their pH values lower than 7.

* Neutral: A pH of 7 is considered neutral (like pure water).

* Alkaline (Basic): Alkaline or basic solutions have a higher concentration of hydroxide ions (OH-) and a pH greater than 7.

Important Note: The stronger the acid, the lower its pH value will be.