What Is the Approximate PK_a of a Weak Acid HA

question 56

Multiple Choice

What is the approximate pK_a of a weak acid HA if a solution 0.1 M HA and 0.3 M A^- has a pH of 6.5?

• A)5)8
• B)6)0
• C)6)2
• D)6)4
• E)6)6