Using a pH meter. Schoolgirl using a pH meter on a solution of dilute ethanoic acid (). The display shows an acidic pH of A pH reading m

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Using a pH meter. Schoolgirl using a pH meter on a solution of dilute ethanoic acid (). The display shows an acidic pH of A pH reading measures the concentration of free hydrogen ions. A pH below 7 (acidic) is a higher concentration of hydrogen ions than found in water (pH 7, neutral). A pH above 7 (alkaline) is a lower concentration than found in water.

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Size: 3543px × 2691px
Photo credit: © ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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