Cd2OH+ + 3OH− → 2Cd(OH)2↓
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- Reaction of dicadmium hydroxide ion and hydroxide ion
The reaction of dicadmium hydroxide ion and hydroxide ion yields cadmium hydroxide (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:
- Reaction of cation and anion
- Reaction of cation and hydroxide ion
- Precipitation reaction of cation and anion
Table of contents
Reaction data
Chemical equation
- Reaction of dicadmium hydroxide ion and hydroxide ion
General equation
- Reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ ProductLewis conjugate + (H2O)
- Reaction of cation and hydroxide ion
- CationLewis acid + OH−Lewis base ⟶ Base/Basic salt ionLewis 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 dicadmium hydroxide ion and hydroxide ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Cd2OH+ | Dicadmium hydroxide ion | 1 | Lewis acid | Cation |
| OH− | Hydroxide ion | 3 | Lewis base | Anion Hydroxide ion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Cd(OH)2 | Cadmium hydroxide | 2 | Lewis conjugate | – Base 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 |
|---|---|---|---|---|
| Cd2OH+ | – | – | – | – |
| OH− (g) | -143.5[1] | – | – | – |
| OH− (ao) | -229.994[1] | -157.244[1] | -10.75[1] | -148.5[1] |
* (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 |
|---|---|---|---|---|
| Cd(OH)2 (cr) precipitated | -560.7[1] | -473.6[1] | 96[1] | – |
| Cd(OH)2 (ai) | -535.89[1] | -392.10[1] | -94.6[1] | – |
| Cd(OH)2 (ao) | – | -442.6[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)
- ^ ΔfH°, -143.5 kJ · mol−1
- ^ ΔfH°, -229.994 kJ · mol−1
- ^ ΔfG°, -157.244 kJ · mol−1
- ^ S°, -10.75 J · K−1 · mol−1
- ^ Cp°, -148.5 J · K−1 · mol−1
- ^ ΔfH°, -560.7 kJ · mol−1
- ^ ΔfG°, -473.6 kJ · mol−1
- ^ S°, 96. J · K−1 · mol−1
- ^ ΔfH°, -535.89 kJ · mol−1
- ^ ΔfG°, -392.10 kJ · mol−1
- ^ S°, -94.6 J · K−1 · mol−1
- ^ ΔfG°, -442.6 kJ · mol−1