Colour range of Universal Indicator

Colour range of Universal Indicator

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Credit: SCIENCE PHOTO LIBRARY

Caption: Universal indicator. A range of flasks showing the colours of solutions containing universal indicator at a variety of hydrogen ion concentrations (pH values). At left are strong acids (pH<1), with acidity decreasing toward the centre. The middle flask is neutral (pH=7). Moving toward the right, alkalinity increases until its maximum at pH=14.

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Keywords: acid, acidity, alkaline, alkalinity, analysing, analysis, basic, change, characteristic, chemical, chemistry, classification, collection, colour, coloured, concentration, flask, glass, group, hydrogen ion, indication, neutral, neutrality, order, ph, range, reflection, science, spread, standard, test, testing, ui, universal indicator

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