Question

Fill in the blanks by using the correct word/term given in the brackets.

An acid __ change the color of phenolphthalein. (must/does not)

Answer 1

Phenolphthalein is classified as a synthetic indicator and is prominently used for titrations of acids and bases. The symbol used for representing phenolphthalein is Ph.

1. In the basic solutions, phenolphthalein gives a pink colour.
2. In the acidic solutions, phenolphthalein appears colorless.

Only basic solutions have the potency to present colour change in phenolphthalein.

Thus, acid does not change the colour of phenolphthalein.