Water ionizes into hydrogen ions (H+) and hydroxide ions (OH-). This means it has a pH.

Here's why:

* pH is a measure of the acidity or alkalinity of a solution. It is determined by the concentration of hydrogen ions (H+) in the solution.

* Pure water has a neutral pH of 7, meaning it has an equal concentration of H+ and OH- ions.

* Acids have a pH less than 7, indicating a higher concentration of H+ ions.

* Bases (alkalines) have a pH greater than 7, indicating a higher concentration of OH- ions.

So, because water ionizes into H+ and OH- ions, it has a pH, and that pH is neutral at 7.