How does Universal indicator works??
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Universal indicator is a mixture of indicators.It changes it's colour and tells that how an substance is acidic or basic ......
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A universal indicator is a pH indicator made of a solution of several compounds that exhibits several smooth colour changes over a wide range pH values to indicate the acidityor alkalinity of solutions. Although there are several commercially available universal pH indicators, most are a variation of a formula patented by Yamada in 1933.[1] Details of this patent can be found in Chemical Abstracts.[2]Experiments with Yamada's universal indicator are also described in the Journal of Chemical Education.[3]
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