Basic Titration Methods - Case Studies
Q. In a titration curve, what does a steep slope indicate?
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A.
A weak acid or base
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B.
A strong acid or base
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C.
A neutral solution
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D.
A buffer solution
Solution
A steep slope in a titration curve indicates a strong acid or base, where the pH changes rapidly with the addition of titrant.
Correct Answer: B — A strong acid or base
Q. Which indicator is commonly used in a titration involving hydrochloric acid and sodium hydroxide?
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A.
Phenolphthalein
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B.
Methyl orange
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C.
Bromothymol blue
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D.
Litmus
Solution
Phenolphthalein is commonly used as an indicator in strong acid-strong base titrations because it changes color around pH 7-10.
Correct Answer: A — Phenolphthalein
Q. Which of the following is a common mistake in titration procedures?
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A.
Using a burette for titrant delivery
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B.
Not swirling the flask during titration
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C.
Using a calibrated pipette for the analyte
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D.
Recording the initial volume of the titrant
Solution
Not swirling the flask during titration can lead to inaccurate results as it prevents proper mixing of the reactants.
Correct Answer: B — Not swirling the flask during titration
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