Bicarbonate buffer Sodium Bicarbonate(NaHCO3 )and carbonic acid(H2 co3) Maintain a 20: 1 ratio: HCO3: H2CO3 HCl+ NaHco Hco + NaC Naoh+ hco +> NaHco +hoBicarbonate buffer • Sodium Bicarbonate (NaHCO3 ) and carbonic acid (H2CO3 ) • Maintain a 20:1 ratio : HCO3 - : H2CO3 HCl + NaHCO3 ↔ H2CO3 + NaCl NaOH + H2CO3 ↔ NaHCO3 + H2O