The Indicator Propyl Red Has K_a = 3

question 81

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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Definitions:

Sense of Smell

Also known as olfaction, it is the ability to detect and identify airborne substances or odors through the olfactory system.

Equilibrium

A state of balance between opposing forces or actions, often used in contexts ranging from physics to economics.

Hearing

The sense through which sound is perceived, involving the detection of vibrations through the ear.

Taste

One of the five senses, it is the perception of flavor perceived in the mouth and throat on contact with a substance.