Question

Determine the pH and concentration of COv3 ^2- ions in a 0.98 M H2CO3 solution. Carbonic acid is a diprotic acid whose Ka1=4.3e-7 and Ka2=5.6e-11.

I need help with this problems steps. Ive gone over so much.

Answer 1

Use equilibrium expressions to find \([HCO_3^-]\) then use that to find \([CO_3^{2-}]\).

You can find the pH with the henderson-hasselbalch equation: \(pH=pKa+log\dfrac{[A^-]}{[HA]}\)