H2S + Ni(OH)2 → NiS + 2H2O
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The reaction of hydrogen sulfide and nickel(II) hydroxide yields nickel(II) sulfide and water (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 hydrogen sulfide and nickel(II) hydroxide
General equation
- Reaction of acid and base
- AcidBrønsted acid + BaseBrønsted base ⟶ SaltConjugate base + (H2O)(Conjugate acid)
- Reaction of acid and hydroxide base
- AcidBrønsted acid + Hydroxide baseBrønsted base ⟶ SaltConjugate base + H2OConjugate acid
- Reaction of weak acid and weak base
- Weak acidBrønsted acid + Weak baseBrønsted base ⟶ Salt of weak acid and weak baseConjugate base + (H2O)(Conjugate acid)
Oxidation state of each atom
- Reaction of hydrogen sulfide and nickel(II) hydroxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| H2S | Hydrogen sulfide | 1 | Brønsted acid | Acid Weak acid |
| Ni(OH)2 | Nickel(II) hydroxide | 1 | Brønsted base | Base Hydroxide base Weak base |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NiS | Nickel(II) sulfide | 1 | Conjugate base | Salt Salt of weak acid and weak base |
| H2O | Water | 2 | Conjugate acid | Water |
Thermodynamic changes
Changes in standard condition (1)
- Reaction of hydrogen sulfide and nickel(II) hydroxide◆
ΔrG −73.0 kJ/mol K 6.15 × 1012 pK −12.79
| 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 | −103.3 | −73.0 | −101 | – |
per 1 mol of | −103.3 | −73.0 | −101 | – |
per 1 mol of | −103.3 | −73.0 | −101 | – |
per 1 mol of | −103.3 | −73.0 | −101 | – |
per 1 mol of | −51.65 | −36.5 | −50.5 | – |
Changes in standard condition (2)
- Reaction of hydrogen sulfide and nickel(II) hydroxide
| 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 | −98.7 | – | – | – |
per 1 mol of | −98.7 | – | – | – |
per 1 mol of | −98.7 | – | – | – |
per 1 mol of | −98.7 | – | – | – |
per 1 mol of | −49.4 | – | – | – |
Changes in aqueous solution
- Reaction of hydrogen sulfide and nickel(II) hydroxide◆
ΔrG −78.7 kJ/mol K 6.13 × 1013 pK −13.79
| 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 | −84.3 | −78.7 | −16 | – |
per 1 mol of | −84.3 | −78.7 | −16 | – |
per 1 mol of | −84.3 | −78.7 | −16 | – |
per 1 mol of | −84.3 | −78.7 | −16 | – |
per 1 mol of | −42.1 | −39.4 | −8.0 | – |
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 |
|---|---|---|---|---|
| H2S (g) | -20.63[1] | -33.56[1] | 205.79[1] | 34.23[1] |
| H2S (ao) | -39.7[1] | -27.83[1] | 121[1] | – |
| Ni(OH)2 (cr) | -529.7[1] | -447.2[1] | 88[1] | – |
| Ni(OH)2 (ai) | -513.8[1] | -360.2[1] | -150.2[1] | – |
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (ai):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 |
|---|---|---|---|---|
| NiS (cr) | -82.0[1] | -79.5[1] | 52.97[1] | 47.11[1] |
| NiS (cr) precipitated | -77.4[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, (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°, -20.63 kJ · mol−1
- ^ ΔfG°, -33.56 kJ · mol−1
- ^ S°, 205.79 J · K−1 · mol−1
- ^ Cp°, 34.23 J · K−1 · mol−1
- ^ ΔfH°, -39.7 kJ · mol−1
- ^ ΔfG°, -27.83 kJ · mol−1
- ^ S°, 121. J · K−1 · mol−1
- ^ ΔfH°, -529.7 kJ · mol−1
- ^ ΔfG°, -447.2 kJ · mol−1
- ^ S°, 88. J · K−1 · mol−1
- ^ ΔfH°, -513.8 kJ · mol−1
- ^ ΔfG°, -360.2 kJ · mol−1
- ^ S°, -150.2 J · K−1 · mol−1
- ^ ΔfH°, -82.0 kJ · mol−1
- ^ ΔfG°, -79.5 kJ · mol−1
- ^ S°, 52.97 J · K−1 · mol−1
- ^ Cp°, 47.11 J · K−1 · mol−1
- ^ ΔfH°, -77.4 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