pH Indicators

pH Indicators

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Caption: Several acid-base indicators, they change their colour depending on the pH of a solution. Indicators in a solution form, back row (left to right): bromocresol purple, universal indicator, phenolphthalein. indicators in a paper strip form, front row (left to right): universal indicator, blue litmus, red litmus.

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Keywords: acid, acidic, acidity, alkali, alkaline, alkalinity, base, basic, basicity, blue litmus, bromocresol purple, chemical, chemistry, indicator, indicator strip, litmus, litmus paper, paper strip, ph, ph indicator, phenolphthalein, red litmus, still life, test, test strip, testing, universal indicator

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