Universal Indicator, pH comparison

Universal Indicator, pH comparison

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Caption: Universal indicator added to two test tubes containing different solutions. Left: neutral, right: alkaline. Universal indicator changes its colour depending on the pH of the solution. Red indicates a strong acid, yellow/orange indicates an acid, green is neutral, blue indicates an alkali, and purple indicates a strong alkali.

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Keywords: alkali, alkaline, alkalinity, base, basic, basicity, chemical, chemistry, comparing, comparison, demo, demonstration, educational, experiment, indicator, liquid, measure, measurement, ph, ph indicator, science, solution, still life, strong base, test, test tube, testing, universal indicator, universal ph indicator

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