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Litmus paper, pH paper, and purple cabbage juice are all examples of ______________________. They all change colors depending on a substance's pH.

Acids

Buffers

Indicators

Bases

User Mach
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2 Answers

7 votes
Indicators because they tell you what PH level the substance is
User Cargath
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Indicators because they indicate what the ph level of a substance is
User Lars Baehren
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