Explain in simple terms A 2-year-old child is brought into the ER by his panicked parents. His parents say he ate some pills, possibly antibiotics. His father recently was treated for pneumonia. The child is happy and unconcerned. His heart rate is 88, bp 90/74, and temperature is 37 °C (normal). The bottle label says that the substance has a pKa of 3.8. What percentage of the drug will be hydrophobic (lipid soluble) in the small bowel at a pH of 4.8?

A. 100%
B. 50%
C. 10%
D. 1%