CoOH+ + [Co(OH)3]− → 2Co(OH)2↓
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- Reaction of cobalt(II) hydroxide ion and trihydroxidocobaltate(II) ion
- CoOH+Cobalt(II) hydroxide ion + [Co(OH)3]−Trihydroxidocobaltate(II) ion2Co(OH)2↓Cobalt(II) hydroxide⟶
The reaction of cobalt(II) hydroxide ion and trihydroxidocobaltate(II) ion yields cobalt(II) hydroxide (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) hydroxide ion and trihydroxidocobaltate(II) ion
- CoOH+Cobalt(II) hydroxide ion + [Co(OH)3]−Trihydroxidocobaltate(II) ion2Co(OH)2↓Cobalt(II) hydroxide⟶
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) hydroxide ion and trihydroxidocobaltate(II) ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CoOH+ | Cobalt(II) hydroxide ion | 1 | Lewis acid | Cation |
| [Co(OH)3]− | Trihydroxidocobaltate(II) ion | 1 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Co(OH)2 | Cobalt(II) hydroxide | 2 | Lewis conjugate | – Insoluble in 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 |
|---|---|---|---|---|
| CoOH+ | – | – | – | – |
| [Co(OH)3]− | – | – | – | – |
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 |
|---|---|---|---|---|
| Co(OH)2 (cr) blue, precipitated | – | -450.1[1] | – | – |
| Co(OH)2 (cr) pink, precipitated | -539.7[1] | -454.3[1] | 79[1] | – |
| Co(OH)2 (cr) pink, precipitated, aged | – | -458.1[1] | – | – |
| Co(OH)2 (ai) | -518.0[1] | -369.0[1] | -134[1] | – |
| Co(OH)2 (ao) | – | -421.7[1] | – | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (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)