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    Chemistry Study Set 8
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    Exam 17: Acid-Base Equilibria and Solubility Equilibria
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    The Indicator Propyl Red Has K<sub>a</sub> = 3
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The Indicator Propyl Red Has Ka = 3

Question 77

Question 77

Multiple Choice

The indicator propyl red has Ka = 3.3 × 10-6. What would be the approximate pH range over which it would change color?


A) 3.5 - 5.5
B) 4.5 - 6.5
C) 5.5 - 7.5
D) 6.5 - 8.5
E) 7.5 - 9.5

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