acid-base indicator

American

noun

Chemistry. any substance or object, such as litmus paper, used to detect and register the acidity or basicity of a solution.

acid-base indicator Scientific

A substance, such as litmus paper, that indicates the degree of acidity or basicity of a solution through characteristic color changes.

Example Sentences

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Explain why an acid-base indicator changes color over a range of pH values rather than at a specific pH.

From Textbooks • Feb. 14, 2019

The equilibrium in a solution of the acid-base indicator methyl orange, a weak acid, can be represented by an equation in which we use HIn as a simple representation for the complex methyl orange molecule:

From Textbooks • Feb. 14, 2019

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