Q1. Which of the following is a characteristic of a good titration indicator?
Solution:
A good titration indicator should exhibit a sharp color change at the endpoint to clearly signal the completion of the reaction.
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Q2. Which indicator is commonly used in a strong acid-strong base titration?
Solution:
Phenolphthalein is commonly used as an indicator in strong acid-strong base titrations because it changes color around pH 8.2 to 10.
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Q3. In a weak acid-strong base titration, what is the pH at the equivalence point?
Solution:
In a weak acid-strong base titration, the pH at the equivalence point is greater than 7 due to the formation of a weak conjugate base.
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Q4. In a titration, what is the endpoint?
Solution:
The endpoint of a titration is the point at which the reaction between the titrant and the analyte is complete, often indicated by a color change.
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Q5. What is the endpoint of a titration?
Solution:
The endpoint of a titration is indicated by a color change of the indicator, signaling that the reaction is complete.
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Q6. What is the significance of the equivalence point in titration?
Solution:
The equivalence point is significant because it is the stage in the titration where the amount of titrant added is stoichiometrically equivalent to the amount of analyte present.
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Q7. What is the typical pH range for phenolphthalein as an indicator?
Solution:
Phenolphthalein changes color in the pH range of approximately 4 to 10, making it suitable for many acid-base titrations.
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Q8. Which indicator is commonly used in acid-base titrations?
Solution:
Phenolphthalein, Bromothymol blue, and Methyl orange are all indicators that can be used in acid-base titrations, depending on the pH range of the titration.
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Q9. What is the significance of the titration curve?
Solution:
The titration curve illustrates how the pH of the solution changes as the titrant is added, helping to identify the equivalence point.
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Q10. In a titration, what does the term 'analyte' refer to?
Solution:
The analyte is the substance whose concentration is being determined in the titration process.
