H3SiO4− → HSiO3− + H2O
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The reaction of trihydrogensilicate ion yields hydrogenmetasilicate ion 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
- Condensation reaction of trihydrogensilicate ion
General equation
- Condensation reaction of oxoacid ion
- Oxoate ionLewis conjugate ⟶ Polyacid ionLewis acid + H2OLewis base
Oxidation state of each atom
- Condensation reaction of trihydrogensilicate ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| H3SiO4− | Trihydrogensilicate ion | 1 | Lewis conjugate | Oxoate ion |
Products
Thermodynamic changes
Changes in standard condition
- Condensation reaction of trihydrogensilicate ion◆
ΔrG 0.000 kJ/mol K 1.00 × 100 pK 0.00
| 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 | 0.000 | 0.000 | 0.00 | – |
per 1 mol of Trihydrogensilicate ion | 0.000 | 0.000 | 0.00 | – |
per 1 mol of Hydrogenmetasilicate ion | 0.000 | 0.000 | 0.00 | – |
per 1 mol of | 0.000 | 0.000 | 0.00 | – |
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 |
|---|---|---|---|---|
| H3SiO4− (ao) | -1433.083[1] | -1253.155[1] | 86.65[1] | – |
* (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 |
|---|---|---|---|---|
| HSiO3− (ao) | -1147.253[1] | -1016.026[1] | 16.74[1] | – |
| H2O (cr) | – | – | – | – |
| H2O (l) | -285.830[2] | -237.129[2] | 69.91[2] | 75.291[2] |
| H2O (g) | -241.818[2] | -228.572[2] | 188.825[2] | 33.577[2] |
* (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (l):Liquid, (g):Gas
References
List of references
- 1Colin Stuart Walker, Anraku Sohtaro, Oda Chie, Mitsui Seiichiro, Mihara MorihiroThermodynamic properties of SiO2(aq), HSiO3– and SiO3-2Japan Atomic Energy Agency
- 2Janiel 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)