Au+ + 2CN− → [Au(CN)2]−
Last updated:
- Reaction of gold(I) ion and cyanide ion
- Au+Gold(I) ion + 2CN−Cyanide ion[Au(CN)2]−Dicyanidoaurate(I) ion⟶
The reaction of gold(I) ion and cyanide ion yields dicyanidoaurate(I) ion. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of gold(I) ion and cyanide ion
- Au+Gold(I) ion + 2CN−Cyanide ion[Au(CN)2]−Dicyanidoaurate(I) ion⟶
General equation
- Reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ ProductLewis conjugate + (H2O)
Oxidation state of each atom
- Reaction of gold(I) ion and cyanide ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Au+ | Gold(I) ion | 1 | Lewis acid | Cation |
| CN− | Cyanide ion | 2 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| [Au(CN)2]− | Dicyanidoaurate(I) 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+ (g) | 1262.44[1] | – | – | – |
| CN− (ao) | 150.6[1] | 172.4[1] | 94.1[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(CN)2]− | – | – | – | – |
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)