4. The equivalence point of an acid-base titration curve is at pH 8.1. Which dye can be used as the pH ind for this titration? A. A dye with a pK₂ of 3.9 B. A dye with a pKa of 8.0 C. A dye with a pK, of 6.2 D. A pH indicator cannot be used for acid-base titration.
4. The equivalence point of an acid-base titration curve is at pH 8.1. Which dye can be used as the pH ind for this titration? A. A dye with a pK₂ of 3.9 B. A dye with a pKa of 8.0 C. A dye with a pK, of 6.2 D. A pH indicator cannot be used for acid-base titration.
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Chapter1: Chemical Foundations
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Transcribed Image Text:4. The equivalence point of an acid-base titration curve is at pH 8.1. Which dye can be used as the pH indicato
for this titration?
A. A dye with a pK₂ of 3.9
B. A dye with a pK, of 8.0
C. A dye with a pK, of 6.2
D. A pH indicator cannot be used for acid-base titration.
Expert Solution
Step 1
The indicator is a weak acid (HIn) which shows colour in its deprotonated form (In-).
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