Ph Scale May 2026

: Values below 7 indicate acidity, with 0 being the most acidic.

: A pH of 7.0 is considered neutral (e.g., pure water). ph scale

: Each whole number change represents a tenfold difference in hydrogen ion concentration. For example, a solution with a pH of 4 is 100 times more acidic than one with a pH of 6. Common Examples Classification Battery Acid Highly Acidic Lemon Juice Pure Water Seawater Slightly Basic Baking Soda Liquid Drain Cleaner Highly Basic Measurement Methods pH Scale | U.S. Geological Survey - USGS.gov : Values below 7 indicate acidity, with 0