Here's a breakdown:

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

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

* Acids: Acids have a pH less than 7.

* Bases: Bases have a pH greater than 7.

The higher the pH, the more alkaline (or basic) the solution is.