Na2S2O3 + 2C6H5SO3H → 2C6H5SO3Na + H2S2O3
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The reaction of sodium thiosulfate and benzenesulfonic acid yields sodium benzenesulfonate and thiosulfuric acid. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of sodium thiosulfate and benzenesulfonic acid
General equation
- Salt of weak acidBrønsted base + Strong acidBrønsted acid ⟶ Salt of strong acidConjugate base + Weak acidConjugate acid
Oxidation state of each atom
- Reaction of sodium thiosulfate and benzenesulfonic acid
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na2S2O3 | Sodium thiosulfate | 1 | Brønsted base | Salt of weak acid |
| C6H5SO3H | Benzenesulfonic acid | 2 | Brønsted acid | Strong acid |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| C6H5SO3Na | Sodium benzenesulfonate | 2 | Conjugate base | Salt of strong acid |
| H2S2O3 | Thiosulfuric acid | 1 | Conjugate acid | Weak acid |
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 |
|---|---|---|---|---|
| Na2S2O3 (cr) | -1123.0[1] | -1028.0[1] | 155[1] | – |
| Na2S2O3 (ai) | -1132.40[1] | -1046.0[1] | 184.1[1] | – |
| Na2S2O3 (cr) 5 hydrate | -2607.93[1] | -2229.8[1] | 372[1] | – |
| C6H5SO3H | – | – | – | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution
Thermodynamic data of products
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)