. 2019 Jun 10;5(6):1097–1105. doi: 10.1021/acscentsci.9b00302

Table 1. Homogeneous Reactions.

reaction	K	k_f^a
Hydration Reactions^c
CO₂ + H₂O ⇌ H₂CO₃	1.7 × 10^–3	0.03^a^,^d
CO₂ + HO^– ⇌ HCO₃^–	4.27 × 10⁷	2.2 × 10³^b^,^e
Acid–Base Reactions^c
H₂CO₃ + H₂O ⇌ H₃O⁺ + HCO₃^–	2.51 × 10^–4	2.51 × 10⁶^a
HCO₃^– + H₂O ⇌ H₃O⁺ + CO₃^2–	4.8 × 10^–11	0.48^a
HCO₃^– + HCO₃^– ⇌ H₂CO₃ + CO₃^2–	1.9 × 10^–7	1.9 × 10³^b
H₂CO₃ + OH^– ⇌ HCO₃^– + H₂O	2.5 × 10¹⁰	10¹⁰^b
HCO₃^– + OH^– ⇌ CO₃^2– + H₂O	4.8 × 10³	10⁸^b
2 H₂O ⇌ H₃O⁺ + OH^–	10^–14	10^–4^b

In s^–¹.

In M^–¹ s^–¹.

Bulk concentrations of species in 0.1 M NaHCO₃ solution under a CO₂ atmosphere: [CO₂] = 0.038 M; [H₂CO₃] 6.5 × 10^–5 M; [HCO₃^–] = 0.1 M; [CO₃²^–] = 2.9 × 10^–5 M.

Ref (33).

Ref (34).