A student needs 1.0L of buffer solution with a PH =10.0 .She selects the HCO3^-

Question

>CO3^2- buffer system. The K(HCO3^-) =5.6x10^-11 .
what is the [HCO3^-]/[CO3^2-]ratio for the buffer?

Answer 1

pH = pKa + log[(CO3^-2)/(HCO3^-)]
I would solve for base/acid, then take the reciprocal.