What is the pH value of pure water?

The pH value of pure water is considered neutral and is exactly 7.0 at 25 degrees Celsius (77 degrees Fahrenheit). This neutrality means that the concentration of hydrogen ions (H+) is equal to the concentration of hydroxide ions (OH-) in the solution, resulting in a balanced pH level.

It's also important to note that water acts as a solvent and can dissociate into H+ and OH- ions, thus establishing a neutral state when in pure form. As a result, the pH level of 7 is a standard reference point for acidity and alkalinity, with lower values indicating acidity and higher values indicating alkalinity.