Question

a solution with a pH of 11 is first tested with phenolphthalein and then with litmus. what is the color of each indicator in this solution

Answer 1

The pH of chemical substances range from 0 to 14, that is from acidic to neutral to basic. A solution with a pH of 11 IS BASIC IN NATURE.
When phenolphtalein indicator is added to a basic solution, the colour of the solution will turn to PINK. A solution of pH 11, which is a base, will turn A RED LITMUS PAPER TO BLUE.

Answer 2

pH is the acidic or the basic characteristic of the solution and ranges from 0 to 14. The phenolphthalein indicator turns pink and red litmus turns blue.

What are pH indicators?

pH indicators are the chemical substances that determine the acidic and the basic characteristic of the solution. It indicates the concentration of the hydrogen or the hydroxide ion in a solution.

Phenolphthalein is the acid-base indicator that turns pink at pH above 9. While litmus paper under pH 4.5 is red, and above 8.3 turns blue.

Therefore, at pH 11, phenolphthalein turns pinkish due to basicity, and red litmus turns blue.

Learn more about pH indicators here:

https://brainly.com/question/9518616

#SPJ3