Acid-base indicators are substances that change color in response to changes in pH, allowing the determination of the acidic or basic nature of a solution. They are commonly used in titrations to signal the endpoint of a reaction.
5 Must Know Facts For Your Next Test
Acid-base indicators have a specific pH range over which they change color.
Common examples include litmus, phenolphthalein, and bromothymol blue.
The choice of indicator depends on the expected pH at the titration's equivalence point.
Indicators function due to their different ionic forms having different colors.
Phenolphthalein is colorless in acidic solutions and pink in basic solutions.