Zn2+ + 4SCN− → [Zn(SCN)4]2−
Last updated:
- Reaction of zinc ion and thiocyanate ion
- Zn2+Zinc ion + 4SCN−Thiocyanate ion[Zn(SCN)4]2−Tetrakis(thiocyanato)zincate ion⟶
The reaction of zinc ion and thiocyanate ion yields tetrakis(thiocyanato)zincate 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 zinc ion and thiocyanate ion
- Zn2+Zinc ion + 4SCN−Thiocyanate ion[Zn(SCN)4]2−Tetrakis(thiocyanato)zincate ion⟶
General equation
- Reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ ProductLewis conjugate + (H2O)
Oxidation state of each atom
- Reaction of zinc ion and thiocyanate ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Zn2+ | Zinc ion | 1 | Lewis acid | Cation |
| SCN− | Thiocyanate ion | 4 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| [Zn(SCN)4]2− | Tetrakis(thiocyanato)zincate 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 |
|---|---|---|---|---|
| Zn2+ (g) | 2782.78[1] | – | – | – |
| Zn2+ (ao) | -153.89[1] | -147.06[1] | -112.1[1] | 46[1] |
| SCN− (ao) | 76.44[1] | 92.71[1] | 144.3[1] | -40.2[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 |
|---|---|---|---|---|
| [Zn(SCN)4]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)