* Acidic: pH values below 7 are considered acidic. The lower the pH, the stronger the acid.

* Neutral: A pH of 7 is considered neutral. Pure water has a pH of 7.

* Basic (or Alkaline): pH values above 7 are considered basic. The higher the pH, the stronger the base.

Remember: The pH scale is logarithmic, meaning each whole number change in pH represents a tenfold change in acidity or alkalinity.