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A strip of indicator paper, turned blue, rests on a circular pH color chart, showing the liquid tested is alkaline.
Understanding acids, bases, and the pH scale
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Understanding acids, bases, and the pH scale
The fundamentals of acids and bases and how the pH scale is used to measure them.
Video: Β© American Chemical Society (A Britannica Publishing Partner)

Images

Alkaline testing
Indicator paper is used to determine the pH of a liquid. The paper will turn blue...
Β© Sabine Kappel/Shutterstock.com
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