The Indicator Propyl Red Has K_a = 3 $\times$ 10^-6

question 54

Multiple Choice

The indicator propyl red has K_a = 3.3 $\times$ 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)None of these choices is correct.

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