Question

why phenolphthalein has no effect at acidic and neutral substances?

Answer 1

Answer:

Phenolphthalein is colorless at pH 7. It changes color to a pinkish hue at pH values around 8. It is used as an indicator in acid base titrations which involve a weak acid such as ethanoic acid and a strong base such as sodium hydroxide.Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. ... It is a weak acid, which can lose H+ ions in solution. The phenolphthaleinmolecule is colorless, and the phenolphthaleinion is pink.