Al2(OH)24+ + SiO44− → Al2O3 · SiO2↓ + H2O
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- Reaction of dialuminium dihydroxide ion and silicate ion
- Al2(OH)24+Dialuminium dihydroxide ion + SiO44−Silicate ionAl2O3 · SiO2↓Aluminium silicate + H2OWater⟶
The reaction of dialuminium dihydroxide ion and silicate ion yields aluminium silicate and water. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of dialuminium dihydroxide ion and silicate ion
- Al2(OH)24+Dialuminium dihydroxide ion + SiO44−Silicate ionAl2O3 · SiO2↓Aluminium silicate + H2OWater⟶
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 dialuminium dihydroxide ion and silicate ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Al2(OH)24+ | Dialuminium dihydroxide ion | 1 | Lewis acid | Cation |
| SiO44− | Silicate ion | 1 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Al2O3 · SiO2 | Aluminium silicate | 1 | Lewis conjugate | – Insoluble in water |
| H2O | Water | 1 | – | Water |
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 |
|---|---|---|---|---|
| Al2(OH)24+ | – | – | – | – |
| SiO44− | – | – | – | – |
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 |
|---|---|---|---|---|
| Al2O3 · SiO2 (cr) andalusite | -2590.27[1] | -2442.66[1] | 93.22[1] | 122.72[1] |
| Al2O3 · SiO2 (cr) kyanite | -2594.29[1] | -2443.88[1] | 83.81[1] | 121.71[1] |
| Al2O3 · SiO2 (cr) sillimanite | -2587.76[1] | -2440.99[1] | 96.11[1] | 124.52[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°, -2590.27 kJ · mol−1
- ^ ΔfG°, -2442.66 kJ · mol−1
- ^ S°, 93.22 J · K−1 · mol−1
- ^ Cp°, 122.72 J · K−1 · mol−1
- ^ ΔfH°, -2594.29 kJ · mol−1
- ^ ΔfG°, -2443.88 kJ · mol−1
- ^ S°, 83.81 J · K−1 · mol−1
- ^ Cp°, 121.71 J · K−1 · mol−1
- ^ ΔfH°, -2587.76 kJ · mol−1
- ^ ΔfG°, -2440.99 kJ · mol−1
- ^ S°, 96.11 J · K−1 · mol−1
- ^ Cp°, 124.52 J · K−1 · 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