3HgCl2 + 2AsI3 💧→ 3HgI2↓ + 2AsCl3
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- Reaction of mercury(II) chloride and
The reaction of mercury(II) chloride and yields mercury(II) iodide and . This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of mercury(II) chloride and
General equation
- Precipitation reaction
- Miscible with water/Very soluble in water/Soluble in waterLewis acid + Miscible with water/Very soluble in water/Soluble in waterLewis base💧⟶ Insoluble in water/Very slightly soluble in water/Slightly soluble in waterLewis conjugate + Product(Non-redox product)
Oxidation state of each atom
- Reaction of mercury(II) chloride and
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| HgCl2 | Mercury(II) chloride | 3 | Lewis acid | Soluble in water |
| 2 | Lewis base | Soluble in water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| HgI2 | Mercury(II) iodide | 3 | Lewis conjugate | Very slightly soluble in water |
| 2 | Non-redox product | – |
Thermodynamic changes
Changes in standard condition (1)
- Reaction of mercury(II) chloride and ◆
ΔrG −169.3 kJ/mol K 4.57 × 1029 pK −29.66
| 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 | −136.9 | −169.3 | 109 | – |
per 1 mol of | −45.63 | −56.43 | 36.3 | – |
| −68.45 | −84.65 | 54.5 | – | |
per 1 mol of | −45.63 | −56.43 | 36.3 | – |
| −68.45 | −84.65 | 54.5 | – |
Changes in standard condition (2)
- Reaction of mercury(II) chloride and
| 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 | −129.4 | – | – | – |
per 1 mol of | −43.13 | – | – | – |
| −64.70 | – | – | – | |
per 1 mol of | −43.13 | – | – | – |
| −64.70 | – | – | – |
Changes in aqueous solution
- Reaction of mercury(II) chloride and ◆
ΔrG −106.3 kJ/mol K 4.20 × 1018 pK −18.62
| 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 | −83.2 | −106.3 | 70 | – |
per 1 mol of | −27.7 | −35.43 | 23 | – |
| −41.6 | −53.15 | 35 | – | |
per 1 mol of | −27.7 | −35.43 | 23 | – |
| −41.6 | −53.15 | 35 | – |
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 |
|---|---|---|---|---|
| HgCl2 (cr) | -224.3[1] | -178.6[1] | 146.0[1] | – |
| HgCl2 (ao) | -216.3[1] | -173.2[1] | 155[1] | – |
| (cr) | -58.2[1] | -59.4[1] | 213.05[1] | 105.77[1] |
| (g) | – | – | 388.34[1] | 80.63[1] |
* (cr):Crystalline solid, (ao):Un-ionized aqueous solution, (g):Gas
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 |
|---|---|---|---|---|
| HgI2 (cr) red | -105.4[1] | -101.7[1] | 180[1] | – |
| HgI2 (cr) yellow | -102.9[1] | – | – | – |
| HgI2 (g) | -17.2[1] | -59.9[1] | 336.13[1] | 61.09[1] |
| HgI2 (ao) | -79.5[1] | -75.3[1] | 176[1] | – |
| (l) | -305.0[1] | -259.4[1] | 216.3[1] | – |
| (g) | -261.5[1] | -248.9[1] | 327.17[1] | 75.73[1] |
* (cr):Crystalline solid, (g):Gas, (ao):Un-ionized aqueous solution, (l):Liquid
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°, -224.3 kJ · mol−1
- ^ ΔfG°, -178.6 kJ · mol−1
- ^ S°, 146.0 J · K−1 · mol−1
- ^ ΔfH°, -216.3 kJ · mol−1
- ^ ΔfG°, -173.2 kJ · mol−1
- ^ S°, 155. J · K−1 · mol−1
- ^ ΔfH°, -58.2 kJ · mol−1
- ^ ΔfG°, -59.4 kJ · mol−1
- ^ S°, 213.05 J · K−1 · mol−1
- ^ Cp°, 105.77 J · K−1 · mol−1
- ^ S°, 388.34 J · K−1 · mol−1
- ^ Cp°, 80.63 J · K−1 · mol−1
- ^ ΔfH°, -105.4 kJ · mol−1
- ^ ΔfG°, -101.7 kJ · mol−1
- ^ S°, 180. J · K−1 · mol−1
- ^ ΔfH°, -102.9 kJ · mol−1
- ^ ΔfH°, -17.2 kJ · mol−1
- ^ ΔfG°, -59.9 kJ · mol−1
- ^ S°, 336.13 J · K−1 · mol−1
- ^ Cp°, 61.09 J · K−1 · mol−1
- ^ ΔfH°, -79.5 kJ · mol−1
- ^ ΔfG°, -75.3 kJ · mol−1
- ^ S°, 176. J · K−1 · mol−1
- ^ ΔfH°, -305.0 kJ · mol−1
- ^ ΔfG°, -259.4 kJ · mol−1
- ^ S°, 216.3 J · K−1 · mol−1
- ^ ΔfH°, -261.5 kJ · mol−1
- ^ ΔfG°, -248.9 kJ · mol−1
- ^ S°, 327.17 J · K−1 · mol−1
- ^ Cp°, 75.73 J · K−1 · mol−1