Question

Buffer solutions:

1. Calculate the pH of a carbonate buffer system that contains 0.0065 M HCO3 and 0.0084 M CO32-. The Ka of HCO3- is 4.7 X 10-11.

Answer 1

$pH = -log10([H^{+} ]) = -log10(3.6369*10-11) = 10.44$

$pH=10.44$