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A compound that changes color when it comes in contact with an acid or a base is what?
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A compound that changes color when it comes in contact with an acid or a base is what?

User Jochen Walter
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4 votes
It is called an indicator.
User Oscar Franco
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"An Indicator" changes color when it comes in contact with an acid or a base

An indicator could be anything like:
1) Litmus paper
2) Bromothymol blue
3) Phenolphthalein

Hope this helps!
User Kapitan
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