Question

what are indicators?give example of acid-base indicator.​

Answer 1

Answer:

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Explanation:

Examples of acid-base indicators include litmus paper, phenolphthalein, and red cabbage juice. An acid-base indicator is a weak acid or weak base that dissociates in water to yield the weak acid and its conjugate base or else the weak base and its conjugate acid.

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Answer 2

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. Examples of acid-base indicators include litmus paper, phenolphthalein, and red cabbage juice.