MnOH+ + HS− → MnS↓ + H2O
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- Reaction of manganese(II) hydroxide ion and hydrogensulfide ion
The reaction of manganese(II) hydroxide ion and hydrogensulfide ion yields manganese(II) sulfide and water. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of manganese(II) hydroxide ion and hydrogensulfide ion
General equation
- Reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ ProductLewis conjugate + (H2O)
- Precipitation reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ Insoluble in water/Very slightly soluble in water/Slightly soluble in waterLewis conjugate + (H2O)
Oxidation state of each atom
- Reaction of manganese(II) hydroxide ion and hydrogensulfide ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| MnOH+ | Manganese(II) hydroxide ion | 1 | Lewis acid | Cation |
| HS− | Hydrogensulfide ion | 1 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| MnS | Manganese(II) sulfide | 1 | Lewis conjugate | – Insoluble in water |
| H2O | Water | 1 | – | Water |
Thermodynamic changes
Changes in standard condition
- Reaction of manganese(II) hydroxide ion and hydrogensulfide ion◆
ΔrG −62.6 kJ/mol K 9.27 × 1010 pK −10.97
| 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 | −31.8 | −62.6 | 102 | – |
per 1 mol of Manganese(II) hydroxide ion | −31.8 | −62.6 | 102 | – |
per 1 mol of Hydrogensulfide ion | −31.8 | −62.6 | 102 | – |
per 1 mol of | −31.8 | −62.6 | 102 | – |
per 1 mol of | −31.8 | −62.6 | 102 | – |
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 |
|---|---|---|---|---|
| MnOH+ (ao) | -450.6[1] | -405.0[1] | -17[1] | – |
| HS− (ao) | -17.6[1] | 12.08[1] | 62.8[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 |
|---|---|---|---|---|
| MnS (cr) green | -214.2[1] | -218.4[1] | 78.2[1] | 49.96[1] |
| MnS (am) precipitated, pink | -213.8[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] |
* (cr):Crystalline solid, (am):Amorphous solid, (l):Liquid, (g):Gas
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°, -450.6 kJ · mol−1
- ^ ΔfG°, -405.0 kJ · mol−1
- ^ S°, -17. J · K−1 · mol−1
- ^ ΔfH°, -17.6 kJ · mol−1
- ^ ΔfG°, 12.08 kJ · mol−1
- ^ S°, 62.8 J · K−1 · mol−1
- ^ ΔfH°, -214.2 kJ · mol−1
- ^ ΔfG°, -218.4 kJ · mol−1
- ^ S°, 78.2 J · K−1 · mol−1
- ^ Cp°, 49.96 J · K−1 · mol−1
- ^ ΔfH°, -213.8 kJ · 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