CuF2 + Na2S 💧→ CuS↓ + 2NaF
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The reaction of copper(II) fluoride and sodium sulfide yields copper(II) sulfide and sodium fluoride. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of copper(II) fluoride and sodium sulfide
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 copper(II) fluoride and sodium sulfide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CuF2 | Copper(II) fluoride | 1 | Lewis acid | Soluble in water |
| Na2S | Sodium sulfide | 1 | Lewis base | Soluble in water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CuS | Copper(II) sulfide | 1 | Lewis conjugate | Insoluble in water |
| NaF | Sodium fluoride | 2 | Non-redox product | – |
Thermodynamic changes
Changes in standard condition
- Reaction of copper(II) fluoride and sodium sulfide
| 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 | −292.9 | – | – | – |
per 1 mol of | −292.9 | – | – | – |
per 1 mol of | −292.9 | – | – | – |
per 1 mol of | −292.9 | – | – | – |
per 1 mol of | −146.4 | – | – | – |
Changes in aqueous solution
- Reaction of copper(II) fluoride and sodium sulfide
| 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 | −208.6 | – | – | – |
per 1 mol of | −208.6 | – | – | – |
per 1 mol of | −208.6 | – | – | – |
per 1 mol of | −208.6 | – | – | – |
per 1 mol of | −104.3 | – | – | – |
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 |
|---|---|---|---|---|
| CuF2 (cr) | -542.7[1] | – | – | – |
| CuF2 (cr) 2 hydrate | – | -981.4[1] | – | – |
| Na2S (cr) | -364.8[1] | -349.8[1] | 83.7[1] | – |
| Na2S (ai) | -447.3[1] | -438.1[1] | 103.3[1] | – |
| Na2S (cr) 4.5 hydrate | -1725.9[1] | – | – | – |
| Na2S (cr) 5 hydrate | -1886.6[1] | – | – | – |
| Na2S (cr) 9 hydrate | -3074.0[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 |
|---|---|---|---|---|
| CuS (cr) | -53.1[1] | -53.6[1] | 66.5[1] | 47.82[1] |
| NaF (cr) | -573.647[1] | -543.494[1] | 51.46[1] | 46.86[1] |
| NaF (g) | -291.2[1] | -310.5[1] | 217.59[1] | 34.221[1] |
| NaF (ai) | -572.75[1] | -540.68[1] | 45.2[1] | -60.2[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°, -542.7 kJ · mol−1
- ^ ΔfG°, -981.4 kJ · mol−1
- ^ ΔfH°, -364.8 kJ · mol−1
- ^ ΔfG°, -349.8 kJ · mol−1
- ^ S°, 83.7 J · K−1 · mol−1
- ^ ΔfH°, -447.3 kJ · mol−1
- ^ ΔfG°, -438.1 kJ · mol−1
- ^ S°, 103.3 J · K−1 · mol−1
- ^ ΔfH°, -1725.9 kJ · mol−1
- ^ ΔfH°, -1886.6 kJ · mol−1
- ^ ΔfH°, -3074.0 kJ · mol−1
- ^ ΔfH°, -53.1 kJ · mol−1
- ^ ΔfG°, -53.6 kJ · mol−1
- ^ S°, 66.5 J · K−1 · mol−1
- ^ Cp°, 47.82 J · K−1 · mol−1
- ^ ΔfH°, -573.647 kJ · mol−1
- ^ ΔfG°, -543.494 kJ · mol−1
- ^ S°, 51.46 J · K−1 · mol−1
- ^ Cp°, 46.86 J · K−1 · mol−1
- ^ ΔfH°, -291.2 kJ · mol−1
- ^ ΔfG°, -310.5 kJ · mol−1
- ^ S°, 217.59 J · K−1 · mol−1
- ^ Cp°, 34.221 J · K−1 · mol−1
- ^ ΔfH°, -572.75 kJ · mol−1
- ^ ΔfG°, -540.68 kJ · mol−1
- ^ S°, 45.2 J · K−1 · mol−1
- ^ Cp°, -60.2 J · K−1 · mol−1