Question

explain universal indicator

Answer 1

Hello

a mixture of dyes that changes colour gradually over a range of pH and is used (especially as indicator paper) in testing for acids and alkalis.

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Answer 2

A universal indicator is a ph indicator composed of a solution of several compounds that exhibits several smooth colour changes over a ph value range from 0 to 14 to indicate the acidity or alkalinity of solutions, where 7 indicates neutral. Although there are several commercially available universal pH indicators, most are a variation of a formula patented by Yamada in 1933.