Co2+ + [Co(OH)4]2− → 2CoO↓ + 2H2O
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- Reaction of cobalt(II) ion and tetrahydroxidocobaltate(II) ion
The reaction of cobalt(II) ion and tetrahydroxidocobaltate(II) ion yields cobalt(II) oxide and water (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of cobalt(II) ion and tetrahydroxidocobaltate(II) ion
General equation
- Reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ ProductLewis conjugate + (H2O)
- Precipitation reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ Insoluble in water/Very slightly soluble in water/Slightly soluble in waterLewis conjugate + (H2O)
Oxidation state of each atom
- Reaction of cobalt(II) ion and tetrahydroxidocobaltate(II) ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Co2+ | Cobalt(II) ion | 1 | Lewis acid | Cation |
| [Co(OH)4]2− | Tetrahydroxidocobaltate(II) ion | 1 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CoO | Cobalt(II) oxide | 2 | Lewis conjugate | – Insoluble in water |
| H2O | Water | 2 | – | Water |
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 |
|---|---|---|---|---|
| Co2+ (g) | 2844.20[1] | – | – | – |
| Co2+ (ao) | -58.2[1] | -54.4[1] | -113[1] | – |
| [Co(OH)4]2− | – | – | – | – |
* (g):Gas, (ao):Un-ionized aqueous solution
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 |
|---|---|---|---|---|
| CoO (cr) | -237.94[1] | -214.20[1] | 52.97[1] | 55.23[1] |
| H2O (cr) | – | – | – | – |
| H2O (l) | -285.830[1] | -237.129[1] | 69.91[1] | 75.291[1] |
| H2O (g) | -241.818[1] | -228.572[1] | 188.825[1] | 33.577[1] |
* (cr):Crystalline solid, (l):Liquid, (g):Gas
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)
- ^ ΔfH°, 2844.20 kJ · mol−1
- ^ ΔfH°, -58.2 kJ · mol−1
- ^ ΔfG°, -54.4 kJ · mol−1
- ^ S°, -113. J · K−1 · mol−1
- ^ ΔfH°, -237.94 kJ · mol−1
- ^ ΔfG°, -214.20 kJ · mol−1
- ^ S°, 52.97 J · K−1 · mol−1
- ^ Cp°, 55.23 J · K−1 · mol−1
- ^ ΔfH°, -285.830 kJ · mol−1
- ^ ΔfG°, -237.129 kJ · mol−1
- ^ S°, 69.91 J · K−1 · mol−1
- ^ Cp°, 75.291 J · K−1 · mol−1
- ^ ΔfH°, -241.818 kJ · mol−1
- ^ ΔfG°, -228.572 kJ · mol−1
- ^ S°, 188.825 J · K−1 · mol−1
- ^ Cp°, 33.577 J · K−1 · mol−1