Fe(OH)3 + 5FeOH2+ → 2Fe3(OH)45+
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- Reaction of iron(III) hydroxide and iron(III) hydroxide ion
- Fe(OH)3Iron(III) hydroxide + 5FeOH2+Iron(III) hydroxide ion2Fe3(OH)45+Triiron(III) tetrahydroxide ion⟶
The reaction of iron(III) hydroxide and iron(III) hydroxide ion yields triiron(III) tetrahydroxide ion (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 iron(III) hydroxide and iron(III) hydroxide ion
- Fe(OH)3Iron(III) hydroxide + 5FeOH2+Iron(III) hydroxide ion2Fe3(OH)45+Triiron(III) tetrahydroxide ion⟶
General equation
- Reaction of neutral species and cation
- CompoundLewis base + CationLewis acid ⟶ CationLewis conjugate
Oxidation state of each atom
- Reaction of iron(III) hydroxide and iron(III) hydroxide ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Fe(OH)3 | Iron(III) hydroxide | 1 | Lewis base | Compound |
| FeOH2+ | Iron(III) hydroxide ion | 5 | Lewis acid | Cation |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Fe3(OH)45+ | Triiron(III) tetrahydroxide ion | 2 | Lewis conjugate | Cation |
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 |
|---|---|---|---|---|
| Fe(OH)3 (cr) precipitated | -823.0[1] | -696.5[1] | 106.7[1] | – |
| Fe(OH)3 (ao) | – | -659.3[1] | – | – |
| FeOH2+ (ao) | -290.8[1] | -229.41[1] | -142[1] | – |
* (cr):Crystalline solid, (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 |
|---|---|---|---|---|
| Fe3(OH)45+ | – | – | – | – |
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)