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pH

pH is a measure of the acidic or basic (alkaline) nature of a solution. The pH scale ranges from 0 (most acidic) to 14 (most basic).

  • A neutral solution (pure water) has a pH of 7.
  • Solutions with a pH less than 7 are acidic, with 0 being the most acidic.
  • Solutions with a pH greater than 7 are basic (alkaline), with 14 being the most basic.
Author Sydney Youngerman-Cole, RN, BSN, RNC
Editor Susan Van Houten, RN, BSN, MBA
Associate Editor Tracy Landauer
Primary Medical Reviewer Caroline S. Rhoads, MD
- Internal Medicine
Specialist Medical Reviewer Robert L. Cowie, MB, FCP(SA), MD, MSc, MFOM
- Pulmonology
Last Updated July 28, 2006

WebMD Medical Reference from Healthwise

Last Updated: July 28, 2006
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