Ni(OH)2 → Ni2+ + 2OH−
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- Electrolytic dissociation of nickel(II) hydroxide
Electrolytic dissociation of nickel(II) hydroxide yields nickel(II) ion and hydroxide ion (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Electrolytic dissociation of nickel(II) hydroxide
General equation
- Electrolytic dissociation of hydroxide base
- Hydroxide baseBrønsted base ⟶ CationConjugate acid + OH−
Oxidation state of each atom
- Electrolytic dissociation of nickel(II) hydroxide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ni(OH)2 | Nickel(II) hydroxide | 1 | Brønsted base | Hydroxide base |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ni2+ | Nickel(II) ion | 1 | Conjugate acid | Cation |
| OH− | Hydroxide ion | 2 | – | Hydroxide ion |
Thermodynamic changes
Changes in standard condition
- Electrolytic dissociation of nickel(II) hydroxide◆
ΔrG 87.1 kJ/mol K 0.55 × 10−15 pK 15.26
| 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 | 15.7 | 87.1 | −238 | – |
per 1 mol of | 15.7 | 87.1 | −238 | – |
per 1 mol of Nickel(II) ion | 15.7 | 87.1 | −238 | – |
per 1 mol of Hydroxide ion | 7.85 | 43.5 | −119 | – |
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 |
|---|---|---|---|---|
| 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] | – |
* (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 |
|---|---|---|---|---|
| Ni2+ (g) | 2931.390[1] | – | – | – |
| Ni2+ (ao) | -54.0[1] | -45.6[1] | -128.9[1] | – |
| OH− (g) | -143.5[1] | – | – | – |
| OH− (ao) | -229.994[1] | -157.244[1] | -10.75[1] | -148.5[1] |
* (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°, -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°, 2931.390 kJ · mol−1
- ^ ΔfH°, -54.0 kJ · mol−1
- ^ ΔfG°, -45.6 kJ · mol−1
- ^ S°, -128.9 J · K−1 · mol−1
- ^ ΔfH°, -143.5 kJ · mol−1
- ^ ΔfH°, -229.994 kJ · mol−1
- ^ ΔfG°, -157.244 kJ · mol−1
- ^ S°, -10.75 J · K−1 · mol−1
- ^ Cp°, -148.5 J · K−1 · mol−1