Ca(CH3COO)2 + 2NH4F 💧→ CaF2↓ + 2CH3COONH4
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The reaction of calcium acetate and ammonium fluoride yields calcium fluoride and ammonium acetate. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of calcium acetate 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 calcium acetate and ammonium fluoride
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ca(CH3COO)2 | Calcium acetate | 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 |
|---|---|---|---|---|
| CaF2 | Calcium fluoride | 1 | Lewis conjugate | Insoluble in water |
| CH3COONH4 | Ammonium acetate | 2 | Non-redox product | – |
Thermodynamic changes
Changes in standard condition
- Reaction of calcium acetate and ammonium fluoride
- Ca(CH3COO)2Crystalline solid + 2NH4FCrystalline solidCaF2↓Crystalline solid + 2CH3COONH4Crystalline solid💧⟶
| 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 | −44.5 | – | – | – |
per 1 mol of | −44.5 | – | – | – |
per 1 mol of | −22.3 | – | – | – |
per 1 mol of | −44.5 | – | – | – |
per 1 mol of | −22.3 | – | – | – |
Changes in aqueous solution
- Reaction of calcium acetate and ammonium fluoride◆
ΔrG −56.2 kJ/mol K 7.01 × 109 pK −9.85 - Ca(CH3COO)2Ionized aqueous solution + 2NH4FIonized aqueous solutionCaF2↓Crystalline solid + 2CH3COONH4Ionized aqueous solution💧⟶
| 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 | −11.5 | −56.2 | 149.6 | – |
per 1 mol of | −11.5 | −56.2 | 149.6 | – |
per 1 mol of | −5.75 | −28.1 | 74.80 | – |
per 1 mol of | −11.5 | −56.2 | 149.6 | – |
per 1 mol of | −5.75 | −28.1 | 74.80 | – |
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 |
|---|---|---|---|---|
| Ca(CH3COO)2 (cr) | -1479.5[1] | – | – | – |
| Ca(CH3COO)2 (ai) | -1514.86[1] | -1292.19[1] | 120.1[1] | – |
| Ca(CH3COO)2 (cr) 1 hydrate | -1772.3[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 |
|---|---|---|---|---|
| CaF2 (cr) | -1219.6[1] | -1167.3[1] | 68.87[1] | 67.03[1] |
| CaF2 (g) | -781.6[1] | -790.4[1] | 274.37[1] | 51.25[1] |
| CaF2 (ai) | -1208.09[1] | -1111.15[1] | -80.8[1] | – |
| CH3COONH4 (cr) | -616.14[1] | – | – | – |
| CH3COONH4 (ai) | -618.52[1] | -448.61[1] | 200.0[1] | 73.6[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°, -1479.5 kJ · mol−1
- ^ ΔfH°, -1514.86 kJ · mol−1
- ^ ΔfG°, -1292.19 kJ · mol−1
- ^ S°, 120.1 J · K−1 · mol−1
- ^ ΔfH°, -1772.3 kJ · 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°, -1219.6 kJ · mol−1
- ^ ΔfG°, -1167.3 kJ · mol−1
- ^ S°, 68.87 J · K−1 · mol−1
- ^ Cp°, 67.03 J · K−1 · mol−1
- ^ ΔfH°, -781.6 kJ · mol−1
- ^ ΔfG°, -790.4 kJ · mol−1
- ^ S°, 274.37 J · K−1 · mol−1
- ^ Cp°, 51.25 J · K−1 · mol−1
- ^ ΔfH°, -1208.09 kJ · mol−1
- ^ ΔfG°, -1111.15 kJ · mol−1
- ^ S°, -80.8 J · K−1 · mol−1
- ^ ΔfH°, -616.14 kJ · mol−1
- ^ ΔfH°, -618.52 kJ · mol−1
- ^ ΔfG°, -448.61 kJ · mol−1
- ^ S°, 200.0 J · K−1 · mol−1
- ^ Cp°, 73.6 J · K−1 · mol−1