[Cr(OH)4]− → Cr(OH)3 + OH−
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- Electrolytic dissociation of tetrahydroxidochromate(III) ion
Electrolytic dissociation of tetrahydroxidochromate(III) ion yields chromium(III) hydroxide 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 tetrahydroxidochromate(III) ion
General equation
- Electrolytic dissociation of ion
- Polyatomic ion ⟶ Cation/Electrically neutral + Anion/Electrically neutral
Oxidation state of each atom
- Electrolytic dissociation of tetrahydroxidochromate(III) ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| [Cr(OH)4]− | Tetrahydroxidochromate(III) ion | 1 | – | Polyatomic ion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Cr(OH)3 | Chromium(III) hydroxide | 1 | – | Electrically neutral |
| OH− | Hydroxide ion | 1 | – | Anion |
Thermodynamic changes
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 |
|---|---|---|---|---|
| [Cr(OH)4]− | – | – | – | – |
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 |
|---|---|---|---|---|
| Cr(OH)3 (cr) precipitated | -1064.0[1] | – | – | – |
| OH− (g) | -143.5[1] | – | – | – |
| OH− (ao) | -229.994[1] | -157.244[1] | -10.75[1] | -148.5[1] |
* (cr):Crystalline solid, (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)