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A chemist tests an unknown substance with litmus paper. The blue paper remains blue. What can the chemist conclude?

User CALTyang
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1 Answer

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Answer: When blue litmus paper is placed in a substance that is acidic, it will turn to red. However, if placed in a substance that is basic or neutral, it will remain blue. Blue litmus paper is meant to test only for an acidic pH level.

User Rzymek
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