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Module 1: Ácido – base de indicadores

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Indicador universal

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Chemistry - Universal indicator

Universal indicator

Universal indicator is a mixture of several indicators whose change in
colour depends upon the pH of the solution into which it is placed. It can
be used as a solution or soaked into paper. The colour change helps us to
determine the pH of the liquid.

Universal indicator is a more accurate measure of pH than litmus paper.
Universal indicator gives a number of colour changes depending on the
strength of the acid or base (see diagram below).

Universal indicator chart

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