C- The pH at which 50% of the drug is ionized and 50% unionized

Subject
Medicine
System
Biostatistics & Epidemiology

Joyce

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What is the pKa of a drug?

A- The pH at which 100% drug becomes completely ionized
B- The pH at which 100% drug becomes completely unionized
C- The pH at which 50% of the drug is ionized and 50% unionized