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What do we call a substance which is used to show changes in ph by its change in color

User Pevara
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Answer is "an indicator".

Indicators change its color according to the pH of the solution. They shows different colors when the medium is basic and acidic.

Indicator pH range Acidic color Basic color
Methyl orange 3.1 - 4.4 red yellow
Phenolphthalein 8.2 - 10.0 colorless pink
Bromothymol blue 6.0 - 7.6 yellow blue
User Ethan Keller
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