Carbonic acid (H2CO3), a diprotic acid has Ka1=4.0×10^−7 and Ka2=5.0×10^−11. What is the [HCO2−3] of a 0.025 M solution of carbonic acid? a diprotic acid has Ka1=4.0×10^−7 and Ka2=5.0×10^−11. What is the [HCO2−3] of a 0.025 M solution of carbonic acid? Carbonic acid (H2CO3) November 12, 2020 Category: Chapter 6 - Ionic Equilibrium (Level 1 and Level 2) , N Awasthi Physical Chemistry , Facebook Messenger WhatsApp Share this:TwitterFacebook Related