The Indicator Propyl Red Has K_a = 3

question 8

Multiple Choice

The indicator propyl red has K_a = 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)None of these choices are correct.

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