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pH meter

pH meter

T875/1073

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40.6 MB (3.2 MB compressed)

4389 x 3232 pixels

37.1 x 27.4 cm ⏐ 14.6 x 10.8 in (300dpi)

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Credit

ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY ANDREW LAMBERT PHOTOGRAPHY / SCIENCE PHOTO LIBRARY

Caption

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.

Release details

Model release not required. Property release not required.

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