Question

The chemical phenolphthalein can be clear or pink depending on the pH of the solution. Which role would phenolphthalein most likely play in an acid-base titration

A. indicator
B. titrant
C. salt
D. analyte

Answer 1

Phenolphthalein would most likely play the role of an **A. indicator** in an acid-base titration. It is used to signify the endpoint of the titration by changing color based on the pH of the solution. In acidic conditions, it remains clear, and in basic conditions, it turns pink.