9Ca(HCO3)2 + 12e− → 9Ca2+ + 2CH3O− + 4H3O+ + 16CO32−
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- Reduction of calcium hydrogencarbonate
- 9Ca(HCO3)2Calcium hydrogencarbonate + 12e−Electron9Ca2+Calcium ion + 2CH3O−Methoxide ion + 4H3O+Hydronium ion + 16CO32−Carbonate ion⟶
Reduction of calcium hydrogencarbonate yields calcium ion, methoxide ion, hydronium ion, and carbonate ion (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reduction of calcium hydrogencarbonate
- 9Ca(HCO3)2Calcium hydrogencarbonate + 12e−Electron9Ca2+Calcium ion + 2CH3O−Methoxide ion + 4H3O+Hydronium ion + 16CO32−Carbonate ion⟶
General equation
- Reduction of reducible species
- ReactantOxidizing agent + e− ⟶ ProductReduction product
Oxidation state of each atom
- Reduction of calcium hydrogencarbonate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ca(HCO3)2 | Calcium hydrogencarbonate | 9 | Oxidizing | – |
| e− | Electron | 12 | – | Electron |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ca2+ | Calcium ion | 9 | – | – |
| CH3O− | Methoxide ion | 2 | Reduced | – |
| H3O+ | Hydronium ion | 4 | – | – |
| CO32− | Carbonate ion | 16 | – | – |
Thermodynamic changes
Thermodynamic data of reactants
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| Ca(HCO3)2 | – | – | – | – |
| e− | – | – | – | – |
Thermodynamic data of products
| Chemical formula | Standard enthalpy of formation ΔfH° kJ · mol−1 | Standard Gibbs energy of formation ΔfG° kJ · mol−1 | Standard molar entropy S° J · K−1 · mol−1 | Standard molar heat capacity at constant pressure Cp° J · K−1 · mol−1 |
|---|---|---|---|---|
| Ca2+ (g) | 1925.90[1] | – | – | – |
| Ca2+ (ao) | -542.83[1] | -553.58[1] | -53.1[1] | – |
| CH3O− | – | – | – | – |
| H3O+ (ao) | -285.830[1] | -237.129[1] | 69.91[1] | 75.291[1] |
| CO32− (ao) | -677.14[1] | -527.81[1] | -56.9[1] | – |
* (g):Gas, (ao):Un-ionized aqueous solution
References
List of references
- 1Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)