what are universal indicators?

Asked by Kanupriya Bhatia | 15th Jul, 2013, 07:21: PM

Expert Answer:

 A universal indicator is a blend of pH indicator solutions used to identify pH of a solution over a wide range of values.

Color change is used to identify pH values. The most common universal indicators are:

red 0 ? pH ? 3
yellow 3 ? pH ? 6
green 7
blue 8 ? pH ? 11
purple 11 ? pH ? 14

Answered by  | 15th Jul, 2013, 10:17: PM

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