Consider the given examples listed here, find out which substance from the list will turn phenolphthalein pink? (a) vinegar ( b)

Question

grigory [225]

3 years ago

15

Consider the given examples listed here, find out which substance from the list will turn phenolphthalein pink? (a) vinegar ( b)

water (c) lemon juice (d) soap.

Chemistry

1 answer:

egoroff_w [7] · Answer 1 · 2022-03-26T11:14:26+03:00

Answer:

(d) soap.

Explanation:

A soap is obtained by alkaline hydrolysis of a fat to yield the soap and glycerol. This process is known as saponification.

A soap solution is usually basic. Since phenolphthalein turns pink in an alkaline solution, then when phenolphthalein is added to a soap solution, the solution soon turns pink because it is alkaline in nature.

As a matter of fact, a soap sometimes has almost the pH of baking soda!