Li2SO4 + 2NH4F 💧→ 2LiF↓ + (NH4)2SO4
Last updated:
The reaction of lithium sulfate and ammonium fluoride yields lithium fluoride and ammonium sulfate. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of lithium sulfate and ammonium fluoride
General equation
- Precipitation reaction
- Miscible with water/Very soluble in water/Soluble in waterLewis acid + Miscible with water/Very soluble in water/Soluble in waterLewis base💧⟶ Insoluble in water/Very slightly soluble in water/Slightly soluble in waterLewis conjugate + Product(Non-redox product)
Oxidation state of each atom
- Reaction of lithium sulfate and ammonium fluoride
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Li2SO4 | Lithium sulfate | 1 | Lewis acid | Very soluble in water |
| NH4F | Ammonium fluoride | 2 | Lewis base | Very soluble in water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| LiF | Lithium fluoride | 2 | Lewis conjugate | Slightly soluble in water |
| (NH4)2SO4 | Ammonium sulfate | 1 | Non-redox product | – |
Thermodynamic changes
Changes in standard condition
- Reaction of lithium sulfate and ammonium fluoride◆
ΔrG −58.03 kJ/mol K 1.47 × 1010 pK −10.17
| 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 | −48.38 | −58.03 | 32.4 | 22.56 |
per 1 mol of | −48.38 | −58.03 | 32.4 | 22.56 |
per 1 mol of | −24.19 | −29.02 | 16.2 | 11.28 |
per 1 mol of | −24.19 | −29.02 | 16.2 | 11.28 |
per 1 mol of | −48.38 | −58.03 | 32.4 | 22.56 |
Changes in aqueous solution
- Reaction of lithium sulfate and ammonium fluoride◆
ΔrG −31.18 kJ/mol K 2.90 × 105 pK −5.46
| 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 | −9.70 | −31.18 | 71.7 | 159.3 |
per 1 mol of | −9.70 | −31.18 | 71.7 | 159.3 |
per 1 mol of | −4.85 | −15.59 | 35.9 | 79.65 |
per 1 mol of | −4.85 | −15.59 | 35.9 | 79.65 |
per 1 mol of | −9.70 | −31.18 | 71.7 | 159.3 |
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 |
|---|---|---|---|---|
| Li2SO4 (cr) | -1436.49[1] | -1321.70[1] | 115.1[1] | 117.57[1] |
| Li2SO4 (ai) | -1466.24[1] | -1331.20[1] | 47.3[1] | -155.6[1] |
| Li2SO4 (cr) 1 hydrate | -1735.5[1] | -1565.5[1] | 163.6[1] | 151.08[1] |
| NH4F (cr) | -463.96[1] | -348.68[1] | 71.96[1] | 65.27[1] |
| NH4F (ai) | -465.14[1] | -358.09[1] | 99.6[1] | -26.8[1] |
* (cr):Crystalline 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 |
|---|---|---|---|---|
| LiF (cr) | -615.97[1] | -587.71[1] | 35.65[1] | 41.59[1] |
| LiF (g) | -339.82[1] | -360.64[1] | 200.297[1] | 31.30[1] |
| LiF (ai) | -611.12[1] | -571.9[1] | -0.4[1] | -38.07[1] |
| (NH4)2SO4 (cr) | -1180.85[1] | -901.67[1] | 220.1[1] | 187.49[1] |
| (NH4)2SO4 (ai) | -1174.28[1] | -903.14[1] | 246.9[1] | -133.1[1] |
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution
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°, -1436.49 kJ · mol−1
- ^ ΔfG°, -1321.70 kJ · mol−1
- ^ S°, 115.1 J · K−1 · mol−1
- ^ Cp°, 117.57 J · K−1 · mol−1
- ^ ΔfH°, -1466.24 kJ · mol−1
- ^ ΔfG°, -1331.20 kJ · mol−1
- ^ S°, 47.3 J · K−1 · mol−1
- ^ Cp°, -155.6 J · K−1 · mol−1
- ^ ΔfH°, -1735.5 kJ · mol−1
- ^ ΔfG°, -1565.5 kJ · mol−1
- ^ S°, 163.6 J · K−1 · mol−1
- ^ Cp°, 151.08 J · K−1 · mol−1
- ^ ΔfH°, -463.96 kJ · mol−1
- ^ ΔfG°, -348.68 kJ · mol−1
- ^ S°, 71.96 J · K−1 · mol−1
- ^ Cp°, 65.27 J · K−1 · mol−1
- ^ ΔfH°, -465.14 kJ · mol−1
- ^ ΔfG°, -358.09 kJ · mol−1
- ^ S°, 99.6 J · K−1 · mol−1
- ^ Cp°, -26.8 J · K−1 · mol−1
- ^ ΔfH°, -615.97 kJ · mol−1
- ^ ΔfG°, -587.71 kJ · mol−1
- ^ S°, 35.65 J · K−1 · mol−1
- ^ Cp°, 41.59 J · K−1 · mol−1
- ^ ΔfH°, -339.82 kJ · mol−1
- ^ ΔfG°, -360.64 kJ · mol−1
- ^ S°, 200.297 J · K−1 · mol−1
- ^ Cp°, 31.30 J · K−1 · mol−1
- ^ ΔfH°, -611.12 kJ · mol−1
- ^ ΔfG°, -571.9 kJ · mol−1
- ^ S°, -0.4 J · K−1 · mol−1
- ^ Cp°, -38.07 J · K−1 · mol−1
- ^ ΔfH°, -1180.85 kJ · mol−1
- ^ ΔfG°, -901.67 kJ · mol−1
- ^ S°, 220.1 J · K−1 · mol−1
- ^ Cp°, 187.49 J · K−1 · mol−1
- ^ ΔfH°, -1174.28 kJ · mol−1
- ^ ΔfG°, -903.14 kJ · mol−1
- ^ S°, 246.9 J · K−1 · mol−1
- ^ Cp°, -133.1 J · K−1 · mol−1