pH paper showing a base: pH 11

An example figure from the pH Reading generator.

A strip of universal indicator paper turned deep blue, above a pH color chart from 0 to 14, matching pH 11 — A strip of universal indicator paper whose wet end has turned deep blue, above the 0 to 14 color chart. It matches the pH 11 swatch, so the solution is basic. Pair it with the acid strip to ask which solution is which.

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Answer key

pH: 11

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