Hg(SCN)2 + SCN− → [Hg(SCN)3]−
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- Reaction of mercury(II) thiocyanate and thiocyanate ion
The reaction of mercury(II) thiocyanate and thiocyanate ion yields tris(thiocyanato)mercurate(II) 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 mercury(II) thiocyanate and thiocyanate ion
General equation
- Reaction of neutral species and anion
- CompoundLewis acid + AnionLewis base ⟶ AnionLewis conjugate
Oxidation state of each atom
- Reaction of mercury(II) thiocyanate and thiocyanate ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Hg(SCN)2 | Mercury(II) thiocyanate | 1 | Lewis acid | Compound |
| SCN− | Thiocyanate ion | 1 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| [Hg(SCN)3]− | Tris(thiocyanato)mercurate(II) ion | 1 | Lewis conjugate | Anion |
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 |
|---|---|---|---|---|
| Hg(SCN)2 (ao) | 196.2[1] | 251.5[1] | 157.3[1] | – |
| SCN− (ao) | 76.44[1] | 92.71[1] | 144.3[1] | -40.2[1] |
* (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 |
|---|---|---|---|---|
| [Hg(SCN)3]− | – | – | – | – |
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)