Au(OH)2+ + 2OH− → [Au(OH)4]−
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- Reaction of gold(III) dihydroxide ion and hydroxide ion
- Au(OH)2+Gold(III) dihydroxide ion + 2OH−Hydroxide ion[Au(OH)4]−Tetrahydroxidoaurate(III) ion⟶
The reaction of gold(III) dihydroxide ion and hydroxide ion yields tetrahydroxidoaurate(III) ion (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 gold(III) dihydroxide ion and hydroxide ion
- Au(OH)2+Gold(III) dihydroxide ion + 2OH−Hydroxide ion[Au(OH)4]−Tetrahydroxidoaurate(III) ion⟶
General equation
- Reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ ProductLewis conjugate + (H2O)
Oxidation state of each atom
- Reaction of gold(III) dihydroxide ion and hydroxide ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Au(OH)2+ | Gold(III) dihydroxide ion | 1 | Lewis acid | Cation |
| OH− | Hydroxide ion | 2 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| [Au(OH)4]− | Tetrahydroxidoaurate(III) ion | 1 | Lewis conjugate | – |
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 |
|---|---|---|---|---|
| Au(OH)2+ | – | – | – | – |
| 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 |
|---|---|---|---|---|
| [Au(OH)4]− | – | – | – | – |
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)