4KI + 3Hg(OH)2 + 6H+ → 4K+ + 2I2 + 2Hg + 6H2O + Hg2+
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- Reaction of potassium iodide and mercury(II) hydroxide under acidic condition
- 4KIPotassium iodide + 3Hg(OH)2Mercury(II) hydroxide + 6H+Hydrogen ion4K+Potassium ion + 2 + 2 + 6H2OWater + Hg2+Mercury(II) ion⟶
The reaction of potassium iodide, mercury(II) hydroxide, and hydrogen ion yields potassium ion, , , water, and mercury(II) ion (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of potassium iodide and mercury(II) hydroxide under acidic condition
- 4KIPotassium iodide + 3Hg(OH)2Mercury(II) hydroxide + 6H+Hydrogen ion4K+Potassium ion + 2 + 2 + 6H2OWater + Hg2+Mercury(II) ion⟶
General equation
- Reaction of oxidizable species and oxidizing species under acidic condition
- Oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent + H+Non-redox agent ⟶ ProductOxidation product + ProductReduction product + H2ONon-redox product
Oxidation state of each atom
- Reaction of potassium iodide and mercury(II) hydroxide under acidic condition
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| KI | Potassium iodide | 4 | Reducing | Oxidizable |
| Hg(OH)2 | Mercury(II) hydroxide | 3 | Oxidizing | Oxidizing under acidic condition |
| H+ | Hydrogen ion | 6 | – | Hydrogen ion |
Products
Thermodynamic changes
Changes in aqueous solution
- Reaction of potassium iodide and mercury(II) hydroxide under acidic condition◆
ΔrG −116.3 kJ/mol K 2.37 × 1020 pK −20.37
| 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 | −116.3 | −68 | – |
per 1 mol of | −34.23 | −29.07 | −17 | – |
per 1 mol of Mercury(II) hydroxide | −45.63 | −38.77 | −23 | – |
per 1 mol of Hydrogen ion | −22.82 | −19.38 | −11 | – |
per 1 mol of Potassium ion | −34.23 | −29.07 | −17 | – |
| −68.45 | −58.15 | −34 | – | |
| −68.45 | −58.15 | −34 | – | |
per 1 mol of | −22.82 | −19.38 | −11 | – |
per 1 mol of Mercury(II) ion | −136.9 | −116.3 | −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 |
|---|---|---|---|---|
| KI (cr) | -327.900[1] | -324.892[1] | 106.32[1] | 52.93[1] |
| KI (g) | -125.5[1] | -166.1[1] | 258.3[1] | 37.11[1] |
| KI (ai) | -307.57[1] | -334.85[1] | 213.8[1] | -120.5[1] |
| Hg(OH)2 (ao) | -355.2[1] | -274.8[1] | 142[1] | – |
| H+ (g) | 1536.202[1] | – | – | – |
| H+ (ao) | 0[1] | 0[1] | 0[1] | 0[1] |
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (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 |
|---|---|---|---|---|
| K+ (g) | 514.26[1] | – | – | – |
| K+ (ao) | -252.38[1] | -283.27[1] | 102.5[1] | 21.8[1] |
| (cr) | 0[1] | 0[1] | 116.135[1] | 54.438[1] |
| (g) | 62.438[1] | 19.327[1] | 260.69[1] | 36.90[1] |
| (ao) | 22.6[1] | 16.40[1] | 137.2[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] | – |
| H2O (cr) | – | – | – | – |
| H2O (l) | -285.830[1] | -237.129[1] | 69.91[1] | 75.291[1] |
| H2O (g) | -241.818[1] | -228.572[1] | 188.825[1] | 33.577[1] |
| Hg2+ (g) | 2890.47[1] | – | – | – |
| Hg2+ (ao) | 171.1[1] | 164.40[1] | -32.2[1] | – |
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (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°, -327.900 kJ · mol−1
- ^ ΔfG°, -324.892 kJ · mol−1
- ^ S°, 106.32 J · K−1 · mol−1
- ^ Cp°, 52.93 J · K−1 · mol−1
- ^ ΔfH°, -125.5 kJ · mol−1
- ^ ΔfG°, -166.1 kJ · mol−1
- ^ S°, 258.3 J · K−1 · mol−1
- ^ Cp°, 37.11 J · K−1 · mol−1
- ^ ΔfH°, -307.57 kJ · mol−1
- ^ ΔfG°, -334.85 kJ · mol−1
- ^ S°, 213.8 J · K−1 · mol−1
- ^ Cp°, -120.5 J · K−1 · mol−1
- ^ ΔfH°, -355.2 kJ · mol−1
- ^ ΔfG°, -274.8 kJ · mol−1
- ^ S°, 142. J · K−1 · mol−1
- ^ ΔfH°, 1536.202 kJ · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 0 J · K−1 · mol−1
- ^ Cp°, 0 J · K−1 · mol−1
- ^ ΔfH°, 514.26 kJ · mol−1
- ^ ΔfH°, -252.38 kJ · mol−1
- ^ ΔfG°, -283.27 kJ · mol−1
- ^ S°, 102.5 J · K−1 · mol−1
- ^ Cp°, 21.8 J · K−1 · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 116.135 J · K−1 · mol−1
- ^ Cp°, 54.438 J · K−1 · mol−1
- ^ ΔfH°, 62.438 kJ · mol−1
- ^ ΔfG°, 19.327 kJ · mol−1
- ^ S°, 260.69 J · K−1 · mol−1
- ^ Cp°, 36.90 J · K−1 · mol−1
- ^ ΔfH°, 22.6 kJ · mol−1
- ^ ΔfG°, 16.40 kJ · mol−1
- ^ S°, 137.2 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°, -285.830 kJ · mol−1
- ^ ΔfG°, -237.129 kJ · mol−1
- ^ S°, 69.91 J · K−1 · mol−1
- ^ Cp°, 75.291 J · K−1 · mol−1
- ^ ΔfH°, -241.818 kJ · mol−1
- ^ ΔfG°, -228.572 kJ · mol−1
- ^ S°, 188.825 J · K−1 · mol−1
- ^ Cp°, 33.577 J · K−1 · mol−1
- ^ ΔfH°, 2890.47 kJ · mol−1
- ^ ΔfH°, 171.1 kJ · mol−1
- ^ ΔfG°, 164.40 kJ · mol−1
- ^ S°, -32.2 J · K−1 · mol−1