2Hg2Cl2 + 3e− → 2Hg + 4Cl− + Hg22+
Last updated:
- Reduction of mercury(I) chloride
Reduction of mercury(I) chloride yields , chloride ion, and dimercury(I) ion (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reduction of mercury(I) chloride
General equation
- Reduction of reducible species
- ReactantOxidizing agent + e− ⟶ ProductReduction product
Oxidation state of each atom
- Reduction of mercury(I) chloride
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Hg2Cl2 | Mercury(I) chloride | 2 | Oxidizing | – |
| e− | Electron | 3 | – | Electron |
Products
Thermodynamic changes
Changes in standard condition
- Reduction of mercury(I) chloride◆
ΔrG 128.7 kJ/mol K 0.28 × 10−22 pK 22.55 - 2Hg2Cl2Crystalline solid + 3e−2Un-ionized aqueous solution + 4Cl−Un-ionized aqueous solution + Hg22+Un-ionized aqueous solution⟶
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | 109.6 | 128.7 | 68 | – |
per 1 mol of | 54.80 | 64.35 | 34 | – |
per 1 mol of Electron | 36.53 | 42.90 | 23 | – |
| 54.80 | 64.35 | 34 | – | |
per 1 mol of Chloride ion | 27.40 | 32.17 | 17 | – |
per 1 mol of Dimercury(I) ion | 109.6 | 128.7 | 68 | – |
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 |
|---|---|---|---|---|
| Hg2Cl2 (cr) | -265.22[1] | -210.745[1] | 192.5[1] | – |
| e− | – | – | – | – |
* (cr):Crystalline solid
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 |
|---|---|---|---|---|
| (cr) | – | – | – | – |
| (l) | 0[1] | 0[1] | 76.02[1] | 27.983[1] |
| (g) | 61.317[1] | 31.820[1] | 174.96[1] | 20.786[1] |
| (ao) | 37.7[1] | 39.3[1] | 71[1] | – |
| Cl− (g) | -233.13[1] | – | – | – |
| Cl− (ao) | -167.159[1] | -131.228[1] | 56.5[1] | -136.4[1] |
| Hg22+ (ao) | 172.4[1] | 153.52[1] | 84.5[1] | – |
* (cr):Crystalline solid, (l):Liquid, (g):Gas, (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°, -265.22 kJ · mol−1
- ^ ΔfG°, -210.745 kJ · mol−1
- ^ S°, 192.5 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 76.02 J · K−1 · mol−1
- ^ Cp°, 27.983 J · K−1 · mol−1
- ^ ΔfH°, 61.317 kJ · mol−1
- ^ ΔfG°, 31.820 kJ · mol−1
- ^ S°, 174.96 J · K−1 · mol−1
- ^ Cp°, 20.786 J · K−1 · mol−1
- ^ ΔfH°, 37.7 kJ · mol−1
- ^ ΔfG°, 39.3 kJ · mol−1
- ^ S°, 71. J · K−1 · mol−1
- ^ ΔfH°, -233.13 kJ · mol−1
- ^ ΔfH°, -167.159 kJ · mol−1
- ^ ΔfG°, -131.228 kJ · mol−1
- ^ S°, 56.5 J · K−1 · mol−1
- ^ Cp°, -136.4 J · K−1 · mol−1
- ^ ΔfH°, 172.4 kJ · mol−1
- ^ ΔfG°, 153.52 kJ · mol−1
- ^ S°, 84.5 J · K−1 · mol−1