Answer to Question #288898 in Organic Chemistry for Sally

Question

Consider a buffer made up of 0.10 M H2PO4^- and 0.32 M HPO4^2-. The Ka of H2PO4^- is 6.2x10^-8. What is the resulting pH when 1 liter of the buffer is mixed with 0.01 mol HClO4? Assume no change in volume occurs upon addition of the acid.

A. 8.54

B. 6.76

C. 7.66

D. 8.43

Answer 1

D. 8.43