Na2B4O7 + 2H[AuCl4] → 2NaCl + 2AuCl3 + 2B2O3 + H2O
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The reaction of sodium tetraborate and tetrachloridoauric(III) acid yields sodium chloride, gold(III) chloride, diboron trioxide, 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
- Reaction of sodium tetraborate and tetrachloridoauric(III) acid
General equation
- Salt of weak acidBrønsted base + Strong acidBrønsted acid ⟶ Salt of strong acidConjugate base + Acidic oxide + H2OConjugate acid
Oxidation state of each atom
- Reaction of sodium tetraborate and tetrachloridoauric(III) acid
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Na2B4O7 | Sodium tetraborate | 1 | Brønsted base | Salt of weak acid |
| H[AuCl4] | Tetrachloridoauric(III) acid | 2 | Brønsted acid | Strong acid |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NaCl | Sodium chloride | 2 | Conjugate base | Salt of strong acid |
| AuCl3 | Gold(III) chloride | 2 | Conjugate base | Salt of strong acid |
| B2O3 | Diboron trioxide | 2 | – | Acidic oxide |
| H2O | Water | 1 | Conjugate acid | 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 |
|---|---|---|---|---|
| Na2B4O7 (cr) | -3291.1[1] | -3096.0[1] | 189.54[1] | 186.77[1] |
| Na2B4O7 (am) | -3271.1[1] | -3076.8[1] | 192.9[1] | – |
| Na2B4O7 (ai) | – | -3128.7[1] | – | – |
| Na2B4O7 (cr) 4 hydrate | -4507.4[1] | – | – | – |
| Na2B4O7 (cr) 5 hydrate | -4802.4[1] | – | – | – |
| Na2B4O7 (cr) 10 hydrate | -6288.6[1] | -5516.0[1] | 586[1] | 615[1] |
| H[AuCl4] | – | – | – | – |
* (cr):Crystalline solid, (am):Amorphous solid, (ai):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 |
|---|---|---|---|---|
| NaCl (cr) | -411.153[1] | -384.138[1] | 72.13[1] | 50.50[1] |
| NaCl (g) | -176.65[1] | -196.66[1] | 229.81[1] | 35.77[1] |
| NaCl (ai) | -407.27[1] | -393.133[1] | 115.5[1] | -90.0[1] |
| AuCl3 (cr) | -117.6[1] | – | – | – |
| AuCl3 (cr) 2 hydrate | -715.0[1] | – | – | – |
| B2O3 (cr) | -1272.77[1] | -1193.65[1] | 53.97[1] | 62.93[1] |
| B2O3 (am) | -1254.53[1] | -1182.3[1] | 77.8[1] | 61.1[1] |
| B2O3 (g) | -843.79[1] | -831.97[1] | 279.81[1] | 66.86[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, (g):Gas, (ai):Ionized aqueous solution, (am):Amorphous solid, (l):Liquid
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°, -3291.1 kJ · mol−1
- ^ ΔfG°, -3096.0 kJ · mol−1
- ^ S°, 189.54 J · K−1 · mol−1
- ^ Cp°, 186.77 J · K−1 · mol−1
- ^ ΔfH°, -3271.1 kJ · mol−1
- ^ ΔfG°, -3076.8 kJ · mol−1
- ^ S°, 192.9 J · K−1 · mol−1
- ^ ΔfG°, -3128.7 kJ · mol−1
- ^ ΔfH°, -4507.4 kJ · mol−1
- ^ ΔfH°, -4802.4 kJ · mol−1
- ^ ΔfH°, -6288.6 kJ · mol−1
- ^ ΔfG°, -5516.0 kJ · mol−1
- ^ S°, 586. J · K−1 · mol−1
- ^ Cp°, 615. J · K−1 · mol−1
- ^ ΔfH°, -411.153 kJ · mol−1
- ^ ΔfG°, -384.138 kJ · mol−1
- ^ S°, 72.13 J · K−1 · mol−1
- ^ Cp°, 50.50 J · K−1 · mol−1
- ^ ΔfH°, -176.65 kJ · mol−1
- ^ ΔfG°, -196.66 kJ · mol−1
- ^ S°, 229.81 J · K−1 · mol−1
- ^ Cp°, 35.77 J · K−1 · mol−1
- ^ ΔfH°, -407.27 kJ · mol−1
- ^ ΔfG°, -393.133 kJ · mol−1
- ^ S°, 115.5 J · K−1 · mol−1
- ^ Cp°, -90.0 J · K−1 · mol−1
- ^ ΔfH°, -117.6 kJ · mol−1
- ^ ΔfH°, -715.0 kJ · mol−1
- ^ ΔfH°, -1272.77 kJ · mol−1
- ^ ΔfG°, -1193.65 kJ · mol−1
- ^ S°, 53.97 J · K−1 · mol−1
- ^ Cp°, 62.93 J · K−1 · mol−1
- ^ ΔfH°, -1254.53 kJ · mol−1
- ^ ΔfG°, -1182.3 kJ · mol−1
- ^ S°, 77.8 J · K−1 · mol−1
- ^ Cp°, 61.1 J · K−1 · mol−1
- ^ ΔfH°, -843.79 kJ · mol−1
- ^ ΔfG°, -831.97 kJ · mol−1
- ^ S°, 279.81 J · K−1 · mol−1
- ^ Cp°, 66.86 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