HSiO3− + H2O → H2SiO42− + H+
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The reaction of hydrogenmetasilicate ion and water yields dihydrogensilicate ion and hydrogen 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 hydrogenmetasilicate ion and water
General equation
- Cation/AnionBrønsted acid + H2OBrønsted base ⟶ Proton accepting ion/BaseConjugate base + H+Conjugate acid
Oxidation state of each atom
- Reaction of hydrogenmetasilicate ion and water
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| HSiO3− | Hydrogenmetasilicate ion | 1 | Brønsted acid | Anion |
| H2O | Water | 1 | Brønsted base | Water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| H2SiO42− | Dihydrogensilicate ion | 1 | Conjugate base | Proton accepting ion |
| H+ | Hydrogen ion | 1 | Conjugate acid | Hydrogen ion |
Thermodynamic changes
Changes in standard condition
| 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 | 42.677 | 76.262 | −112.97 | – |
per 1 mol of Hydrogenmetasilicate ion | 42.677 | 76.262 | −112.97 | – |
per 1 mol of | 42.677 | 76.262 | −112.97 | – |
per 1 mol of Dihydrogensilicate ion | 42.677 | 76.262 | −112.97 | – |
per 1 mol of Hydrogen ion | 42.677 | 76.262 | −112.97 | – |
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 |
|---|---|---|---|---|
| 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
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 |
|---|---|---|---|---|
| H2SiO42− (ao) | -1390.406[1] | -1176.893[1] | -26.32[1] | – |
| H+ (g) | 1536.202[2] | – | – | – |
| H+ (ao) | 0[2] | 0[2] | 0[2] | 0[2] |
* (ao):Un-ionized aqueous solution, (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)
- ^ 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
- ^ ΔfH°, 1536.202 kJ · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 0 J · K−1 · mol−1
- ^ Cp°, 0 J · K−1 · mol−1