Universal indicator

Universal indicator

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Caption: Universal indicator. Universal indicator was added to two test tubes containing sodium hydroxide solutions of different concentrations, resulting in different pH values. Left: pH=9 (weak base), right: pH=12 (strong base). Universal indicator changes its colour depending on the pH of the solution.

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

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