Question

What is the indicator for soap solution ?

Answer 1

Explanation:

Phenolphthalein drops should be used in a solution rather than directly on soap, and can only tell you so much. The main issue with phenolphthalein drops is how they work as a pH indicator. When added to a solution, phenolphthalein changes from clear to pink, depending on the pH of the solution.

Answer 2

Answer:

by using litmus paper, we can find nature of solutions.

so when dropping soap solutions on litmus paper it change in to blue colour.