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5. Describe a chemical indicator. What is it? What is it used for? How does it work?
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5. Describe a chemical indicator. What is it? What is it used for? How does it work?

User TylarBen
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Litmus paper , determine the acidity/alkalinity of a solution ,turns red on acids and blue on alkaline while naturally purple .

User Agustina
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Litmus paper , determine the acidity/alkalinity of a solution ,turns red on acids and blue on alkaline while naturally purple
User Buddhabrot
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