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 pKa = 5.5. At a physiological pH of 7.4, what is the ratio of concentrations, [PE]/[PEH+]? ![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<sup>+</sup>) has a pK<sub>a </sub>= 5.5. At a physiological pH of 7.4, what is the ratio of concentrations, [PE]/[PEH<sup>+</sup>]? A) 6.7 B) 0.01 C) 0.14 D) 79 E) 21](https://d2lvgg3v3hfg70.cloudfront.net/TB3834/11eb0df4_1731_73a3_9431_fdc9b881fba8_TB3834_00.jpg)
Definitions:
Psychoanalysis
A therapeutic approach founded by Sigmund Freud focusing on unconscious mental processes and early childhood experiences.
Biological Roots
The genetic, neurochemical, and physiological bases of behavior and mental processes, emphasizing the role of nature in psychology.
What We Know
A phrase indicating the extent of knowledge and understanding that has been established on a particular subject up to the current time.
Opportunity Cost
The loss of potential gain from other alternatives when one alternative is chosen.
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