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Universal indicator

Indicator that works over a wide range of pH

A universal indicator is a pH indicator made of a solution of several compounds that exhibit various smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. A universal indicator can be in paper form or present in a form of a solution.

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File:Universal_indicator_paper.jpgFile:Skala_boja_2.JPGFile:Universal_indicator_solution_in_desalinated_water.svg
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