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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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bugmenot1 bugmenot1
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11 years ago
This is the question from my book. And the answer given are as below:" Acid-base indicators are very sensitive to pH changes within its pH range. Two drops of indicator are sufficient to determine the end point of a titration. Indicators are weak acids. Avery samll volume of indicator must be used to avoid changing the original pH of the solution to which it is added. "

Well, I don't really understand, I need more explanations. Pls and Thx.
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#1
11 years ago
You do not want to add too much indicator into the solution, as you do not want change the pH of the solution. Indicators are acids. Adding too much would mean you have to add more base to neutralise which give you wrong info about the actual acid (exclude indicator) in the solution.
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