Which two pKa values would you average to find the isoelectric point if the neutral net charge occurs between pKa values of 3.0 and 5.0?

• A. 3.0 and 5.0
• B. 4.0 and 6.0
• C. 5.0 and 7.0
• D. 2.0 and 3.0

Answer: (A)