The indicator used in neutralizing CH3COOH and NaOH solution has pH range of

The indicator used to neutralize CH₃COOH and NaOH solution is called phenolphthalein, and its pH range is 8-10. When an acid, like CH₃COOH, is mixed with a base, like NaOH, a neutralization reaction occurs, and the resulting solution is neither acidic nor basic but neutral. Phenolphthalein is a chemical compound that changes color depending on the pH of the solution it is in. It is colorless in acidic solutions with a pH below 8 and pink in basic solutions with a pH above 10. Therefore, when phenolphthalein is added to the CH₃COOH and NaOH solution, it will remain colorless as long as the solution is acidic but will turn pink once the solution becomes basic. Since the pH range of phenolphthalein is 8-10, it is suitable for use in neutralizing the CH₃COOH and NaOH solution, as the resulting solution will have a pH within that range, indicating that the acid and base have reacted completely to form a neutral solution.