Table 3 Reaction formulas for the thermodynamic calculations in association with sulfate reduction

Aqueous species

 CO₂ (aq) + H₂O = HCO₃ ⁻ + H⁺

 CO₃ ²⁻ + H⁺ = HCO₃ ⁻

 CaCO₃ (aq) + H⁺ = HCO₃ ⁻ + Ca²⁺

 CaCl⁺ = Cl⁻ + Ca²⁺

 CaCl₂ (aq) = 2Cl⁻ + Ca²⁺

 CaHCO₃ ⁺ = HCO₃ ⁻ + Ca²⁺

 CaSO₄ (aq) = Ca²⁺ + SO₄ ²⁻

 H₂ (aq) + 1/2O₂ (aq) = H₂O

 H₂S (aq) + 2O₂ (aq) = 2H⁺ + SO₄ ²⁻

 HCl (aq) = H⁺ + Cl⁻

 HO₂ ⁻ + H⁺ = H₂O + 1/2O₂ (aq)

 HS⁻ + 2O₂ (aq) = H⁺ + SO₄ ²⁻

 HSO₄ ⁻ = H⁺ + SO₄ ²⁻

 NaCO₃ ⁻ + H⁺ = HCO₃ ⁻ + Na⁺

 NaCl (aq) = Cl⁻ + Na⁺

 NaHCO₃ (aq) = HCO₃ ⁻ + Na⁺

 NaOH (aq) + H⁺ = H₂O + Na⁺

 OH⁻ + H⁺ = H₂O

 S²⁻ + 2O₂ (aq) = SO₄ ²⁻

Solids

 C (in CH₂O) + H₂O + O₂ (aq) = HCO₃ ⁻ + H⁺

 H₂O (in CH₂O) = H₂O

 CaCO₃ + H⁺ = HCO₃ ⁻ + Ca²⁺