Question

What are indicators?

Answer 1

Answer:

A pH indicator is a halochromic chemical compound added in small amounts to a solution so the pH of the solution can be determined visually. Hence, a pH indicator is a chemical detector for hydronium ions or hydrogen ions in the Arrhenius model

Explanation:

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Answer 2

Answer:

An indicator is a substance which changes color in the presence of acids or alkalis. In the laboratory, we use three indicators. These are litmus, phenolphthalein, and methyl orange. Turmeric powder mixed with water is a bright orange-yellow which turns a brick red in the presence of alkali.