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30.A substance that changes color in the presence of acids and bases is called...Select one:a. an anhydride.b. an indicator.c. a precipitate.d. a salt.

Respuesta :

Answer

B. Indicator

Explanation

Indicator chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution.