Testing pH

Testing pH

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Credit: TREVOR CLIFFORD PHOTOGRAPHY/SCIENCE PHOTO LIBRARY

Caption: Testing pH. Universal indicator (left) being used to test the pH of a solution (centre) of sodium hydroxide (right). As sodium hydroxide is an alkali, the indicator is purple.

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Keywords: acid, acidity, alkali, alkaline, alkalinity, apparatus, beaker, bottle, bottles, chemical, chemicals, chemistry, device, equipment, lab, laboratory, measurement, measuring, no-one, nobody, ph, purple, science education, sodium hydroxide, solution, solutions, still life, still-life, test, testing, universal indicator

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