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

---

Definitions:

Reasoning Skills

The capacity to process information logically, analyze arguments, and arrive at valid conclusions, solutions, or interpretations.

Unique Tasks

Specific, distinct activities or challenges that are not common or general in nature.

Creative Intelligence

The ability to produce novel and valuable ideas, encompassing both the creation of new concepts and problem-solving.

Analytic Intelligence

One component of Sternberg's triarchic theory of intelligence, focusing on the ability to solve problems using analysis, logical reasoning, and critical thinking.