Question

question 5 of 10
why was phenolphthalein added to the flask? select all that are correct.
it will act as an indicator.
without it, the solution would not turn a different color and you would not know when the equivalence point had been reached.
it will turn the solution pink when the solution has acid present.
it will turn the solution pink when base is present.

Explanation:

Phenolphthalein is an indicator used in acid - base titrations. It remains colorless in acidic solutions and turns pink in basic solutions. It helps in determining the equivalence point of a titration as there is a color - change at that point.

Answer:

A. It will act as an indicator.
B. Without it, the solution would not turn a different color and you would not know when the equivalence point had been reached.
D. It will turn the solution pink when base is present.