Answer to Question #160000 in General Chemistry for James

Question

Calculate the pH of a carbonate buffer system that contains 0.0065 M HCO₃^- and 0.0084 M CO₃^2-. ( K_a of HCO₃^- is 4.7x0^-11 )

3Calculate the pH of a carbonate buffer system that contains 0.0065 M HCO

Answer 1

PH = pKa - log(acid/salt)

= -log (4.7 × 10^-11) - log (0.0065/0.0084)

= 10.33- (-0.11)

= 10.44