Phenylephrine (PE; See the Structure Below) Is a Nasal Decongestant

question 26

Multiple Choice

Phenylephrine (PE; see the structure below) is a nasal decongestant and is the active ingredient in Sudafed, which contains phenylephrine hydrochloride (PEHCl) .This conjugate acid of phenylephrine (PEH⁺) has a pK_a= 5.5.At a physiological pH of 7.4, what is the ratio of concentrations, [PE]/[PEH⁺]?

• A)6.7
• B)0.01
• C)0.14
• D)79
• E)21

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Definitions:

Presentation Rates

The speed or frequency at which information is presented or delivered during an experiment or learning session.

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