Question

Phenolphthalein dye contains ---- hydroxy (-OH) groups.
Options
One
O Three
Five
Two​

Answer 1

Answer:

three

Explanation:

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Answer 2

Phenolphthalein dye contains two hydroxy (-OH) groups

Explanation:

• Phenolphthalein is an indicator that is used in the acid-base titration.
• It is used to find out the strength of unknown acid or base in the solution.
• It is a chemical compound with a formula of $C20H14O4$.
• It is referred to as HPh or simply Ph.
• It is an acid-base titration indicator
• It serves as a universal indicator along with methyl orange, methyl red, thymol blue, bromothymol blue.
• The action of phenolphthalein is that it turns colorless in acidic solutions and pink in basic solutions.
• It belongs to phthalein dye.
• It is slightly soluble in water and is dissolved in alcohols for use in practicals.
• It is a weak acid with two hydroxy groups attached to it.It can lose Hydrogen ions in the solutions.