In the above titration setup, if you introduce 15 mL of the NaOH with an unknown molarity into the flask and then add 5 drops of phenolphthalein indicator, what will you observe?
Correct answer: A. A pinkish color will appear throughout the solution.
- A. A pinkish color will appear throughout the solution.
- B. A blue color will appear throughout the solution.
- C. There will be a temporary pinkish color that will dissipate.
- D. There will be a temporary blue color that will dissipate.
- E. There will not be a color change.
Explanation
Phenolphthalein indicator is colorless below a pH of 8.3 but is red to pink in basic solutions above this pH. In this NaOH solution, it will be red to pink.
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