a chemical indicator
Answers
Answered by
6
Answer:
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. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.
Answered by
2
Answer:
phenolphthalein
Explanation:
phenolphthalein is chemical indicator.
Similar questions