Phenolphthalein indicator

Phenolphthalein indicator

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Caption: Phenolphthalein indicator. Phenolphthalein indicator solution added to two test tubes containing sodium hydroxide solutions with different pH values, pH = 9 (left) and pH = 11 (right). Phenolphthalein changes its colour depending on the pH of the solution. In acidic solutions it is colourless while in basic solutions it turns into a pinkish violet (fuchsia) colour.

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Keywords: acid, acidic, acidity, alkali, alkaline, alkalinity, base, basicity, chemical, chemistry, comparing, comparison, educational, experiment, indicator, liquid, measure, measurement, naoh, ph, ph indicator, phenolphthalein, science, sodium hydroxide, solution, still life, test, test tubes, testing

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