If K_a2 for a diprotic acid is 1.0 x 10^-7 and K_b1 is 1.0 x 10^-7, what is the value of K_w?

• A. 1.0 x 10^-10
• B. 1.0 x 10^-14
• C. 1.0 x 10^-3
• D. 1.0 x 10^-7

Answer: (B)