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.

Last Updated: June 17, 2008

Author: Maria G. Essig, MS, ELS

Medical Review: Anne C. Poinier, MD - Internal Medicine & Robert L. Cowie, MB, FCP(SA), MD, MSc, MFOM - Pulmonology

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