Universal indicator paper

Universal indicator paper

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Caption: Universal indicator paper packaging showing colour chart. Universal indicator paper changes its colour depending on the pH of the solution tested. It is used to measure the strength of an acid or an alkali. pH is a logarithmic measure of hydrogen ion concentration. Acid solutions have a high concentration of hydrogen ions, while alkali solutions have a low concentration of hydrogen ions.

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Keywords: acid, acidity test, alkalinity, base, chemical, chemistry, color, colour chart, hydrogen ion concentration, indicator, packaging, ph, ph., science, test, universal indicator paper

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