Questions
Which of the following indicators can be used to detect end point in the titration of a weak acid versus strong base?
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Correct option is D
In the titration of a weak acid (say, acetic acid) versus strong base (say, sodium hydroxide), the pH at the equivalence point is more that 7 due to hydrolysis of congugate base of the weak acid. The steep rise in pH around equivalence point encompasses the range 7 to 10. Thus, thymolphthalein can be used as the indicator to locate end point.
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