Chemistry Principal Related to Practical Chemistry All Topic Question for Revision Test Single Correct MCQ
Published on: August 13, 2026

In the titration of sodium carbonate with hydrochloric acid taken in burette the indicator used is

A
phenolphthalein for first equivalence point and methyl orange for second equivalence point
B
methyl orange for first equivalence point and phenolphthalein for second equivalence point
C
either methyl orange or phenolphthalein for both equivalence points
D
phenol red for both equivalence points.

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Text Solution

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The correct answer is:
A

In the titration of sodium carbonate with hydrochloric acid first equivalence point appears at pH of about 8.3, hence, phenolphthalein is used as an indicator for first equivalence point. Whereas, second equivalence point appears at an pH of about 3.9, hence, methyl orange is used as an indicator for second equivalence point.

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