pH scale
scale with values from 0 to 14, used to measure the strength of acids and bases in a substance; a pH of 0 to 7 is acidic, a pH of 7 is neutral, and a pH of 7 to 14 is basic
The pH scale is a measurement system used to indicate the acidity or basicity of a solution. It measures the concentration of hydrogen ions (H+) in a solution. Solutions with a pH between 0-6.9 are considered acidic, while solutions with a pH between 7.1-14 are considered basic or alkaline. A pH of 7 is neutral.
The pH scale ranges from 0 to 14, with 0 being the most acidic and 14 being the most basic, or alkaline. Each unit on the scale represents a tenfold difference in hydrogen ion concentration. For example, a solution with a pH of 4 is ten times more acidic than a solution with a pH of 5.
The pH of a solution can be measured using a pH meter or pH indicator paper. pH meters use an electrode to measure the electrical potential of a solution. pH indicator paper changes color depending on the pH of the solution it is dipped into.
The pH of a solution is important in many settings, including chemistry, biology, and environmental science. In chemical reactions, pH can affect the rate and direction of the reaction. In biology, enzymes and other cellular processes are highly dependent on pH levels. In environmental science, pH can affect the health of aquatic ecosystems and the efficacy of wastewater treatment processes.
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