4
QuizMultiple Choice

Titration Reactions

Question 4 • Foothill-B Period-Chemistry-26/27B

At what point is a base no longer added during a titration?

Answer
w
when the pH increases suddenly in the flask
w
when the phenolphthalein remains clear in the flask
b
before the solution in the flask reaches the equivalency point
b
before half of the base is completely drained from the burette

Explanation

During a titration, the pH rises sharply near the equivalence point. That sudden change signals that the endpoint is being reached, so you stop adding base. Phenolphthalein staying clear indicates the solution has not yet changed to its endpoint color.

AI-written and checked against the verified answer.

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