pH meter

pH meter

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Credit: ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY

Caption: pH measurement. Electrical pH measurement of an alkaline solution of washing soda (sodium carbonate, NaCO3, right). The pH of a solution is a measure of its acidity or alkalinity. The scale runs from 0-14, water is neutral at pH 7. A pH below 7 is an acid, pH 1 being the most acidic. Alkalis have a pH higher than 7, pH 14 being the most alkaline. The pH of this solution is 10.19.

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Keywords: alkali, alkaline, analysis, apparatus, base, beaker, chemical, chemicals, chemistry, crystals, equipment, experiment, industry, measurement, ph meter, probe, reaction, school, sodium carbonate, solution, technology, washing soda

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