Basic Titration Methods - Competitive Exam Level
Q. What is a common mistake made during titration?
A.
Using a burette for titrant delivery
B.
Not swirling the flask during titration
C.
Using a pH meter for endpoint detection
D.
Adding titrant too slowly
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Solution
A common mistake is not swirling the flask during titration, which can lead to an inaccurate endpoint due to uneven mixing.
Correct Answer: B — Not swirling the flask during titration
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Q. What is the main advantage of using a digital burette over a traditional burette?
A.
It is less expensive
B.
It provides more accurate measurements
C.
It is easier to clean
D.
It requires no calibration
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Solution
Digital burettes provide more accurate measurements due to their precise dispensing mechanisms and digital readouts.
Correct Answer: B — It provides more accurate measurements
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Q. What is the main advantage of using a pH meter over indicators in titrations?
A.
It is less expensive
B.
It provides a more precise measurement
C.
It is easier to use
D.
It requires no calibration
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Solution
A pH meter provides a more precise measurement of pH changes during titration compared to visual indicators.
Correct Answer: B — It provides a more precise measurement
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Q. What is the significance of the equivalence point in a titration?
A.
It is the point where the indicator changes color
B.
It is the point where the amount of titrant equals the amount of analyte
C.
It is the point where the solution is neutral
D.
It is the point where the reaction starts
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Solution
The equivalence point is significant because it indicates that the amount of titrant added is stoichiometrically equivalent to the amount of analyte present.
Correct Answer: B — It is the point where the amount of titrant equals the amount of analyte
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Q. Which indicator is commonly used in strong acid-strong base titrations?
A.
Phenolphthalein
B.
Methyl orange
C.
Bromothymol blue
D.
Litmus
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Solution
Phenolphthalein is commonly used in strong acid-strong base titrations because it changes color at a pH around 8.2 to 10.
Correct Answer: A — Phenolphthalein
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