SrCl2 + K2S 💧→ SrS↓ + 2KCl
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The reaction of strontium chloride and potassium sulfide yields strontium sulfide and potassium chloride. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of strontium chloride and potassium 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 strontium chloride and potassium sulfide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| SrCl2 | Strontium chloride | 1 | Lewis acid | Very soluble in water |
| K2S | Potassium sulfide | 1 | Lewis base | Soluble in water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| SrS | Strontium sulfide | 1 | Lewis conjugate | Slightly soluble in water |
| KCl | Potassium chloride | 2 | Non-redox product | – |
Thermodynamic changes
Changes in standard condition
- Reaction of strontium chloride and potassium sulfide◆
ΔrG −141.0 kJ/mol K 5.04 × 1024 pK −24.70
| 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 | −136.3 | −141.0 | 14 | – |
per 1 mol of | −136.3 | −141.0 | 14 | – |
per 1 mol of | −136.3 | −141.0 | 14 | – |
per 1 mol of | −136.3 | −141.0 | 14 | – |
per 1 mol of | −68.15 | −70.50 | 7.0 | – |
Changes in aqueous solution
- Reaction of strontium chloride and potassium sulfide◆
ΔrG 5.8 kJ/mol K 0.96 × 10−1 pK 1.02
| 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 | 40.1 | 5.8 | 115.5 | – |
per 1 mol of | 40.1 | 5.8 | 115.5 | – |
per 1 mol of | 40.1 | 5.8 | 115.5 | – |
per 1 mol of | 40.1 | 5.8 | 115.5 | – |
per 1 mol of | 20.1 | 2.9 | 57.75 | – |
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 |
|---|---|---|---|---|
| SrCl2 (cr) α | -828.9[1] | -781.1[1] | 114.85[1] | 75.60[1] |
| SrCl2 (g) | -485.8[1] | -496.2[1] | 310.81[1] | 55.77[1] |
| SrCl2 (ai) | -880.10[1] | -821.91[1] | 80.3[1] | – |
| SrCl2 (cr) 1 hydrate | -1136.8[1] | -1036.3[1] | 172[1] | 120.1[1] |
| SrCl2 (cr) 2 hydrate | -1438.0[1] | -1281.8[1] | 218[1] | 160.2[1] |
| SrCl2 (cr) 6 hydrate | -2623.8[1] | -2240.92[1] | 390.8[1] | – |
| K2S (cr) | -380.7[1] | -364.0[1] | 105[1] | – |
| K2S (ai) | -471.5[1] | -480.7[1] | 190.4[1] | – |
| K2S (cr) 2 hydrate | -975.3[1] | – | – | – |
| K2S (cr) 5 hydrate | -1871.5[1] | – | – | – |
* (cr):Crystalline solid, (g):Gas, (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 |
|---|---|---|---|---|
| SrS (cr) | -472.4[1] | -467.8[1] | 68.2[1] | 48.70[1] |
| SrS (g) | 109[1] | – | – | – |
| KCl (cr) | -436.747[1] | -409.14[1] | 82.59[1] | 51.30[1] |
| KCl (g) | -214.14[1] | -233.0[1] | 239.10[1] | 36.48[1] |
| KCl (ai) | -419.53[1] | -414.49[1] | 159.0[1] | -114.6[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°, -828.9 kJ · mol−1
- ^ ΔfG°, -781.1 kJ · mol−1
- ^ S°, 114.85 J · K−1 · mol−1
- ^ Cp°, 75.60 J · K−1 · mol−1
- ^ ΔfH°, -485.8 kJ · mol−1
- ^ ΔfG°, -496.2 kJ · mol−1
- ^ S°, 310.81 J · K−1 · mol−1
- ^ Cp°, 55.77 J · K−1 · mol−1
- ^ ΔfH°, -880.10 kJ · mol−1
- ^ ΔfG°, -821.91 kJ · mol−1
- ^ S°, 80.3 J · K−1 · mol−1
- ^ ΔfH°, -1136.8 kJ · mol−1
- ^ ΔfG°, -1036.3 kJ · mol−1
- ^ S°, 172. J · K−1 · mol−1
- ^ Cp°, 120.1 J · K−1 · mol−1
- ^ ΔfH°, -1438.0 kJ · mol−1
- ^ ΔfG°, -1281.8 kJ · mol−1
- ^ S°, 218. J · K−1 · mol−1
- ^ Cp°, 160.2 J · K−1 · mol−1
- ^ ΔfH°, -2623.8 kJ · mol−1
- ^ ΔfG°, -2240.92 kJ · mol−1
- ^ S°, 390.8 J · K−1 · mol−1
- ^ ΔfH°, -380.7 kJ · mol−1
- ^ ΔfG°, -364.0 kJ · mol−1
- ^ S°, 105. J · K−1 · mol−1
- ^ ΔfH°, -471.5 kJ · mol−1
- ^ ΔfG°, -480.7 kJ · mol−1
- ^ S°, 190.4 J · K−1 · mol−1
- ^ ΔfH°, -975.3 kJ · mol−1
- ^ ΔfH°, -1871.5 kJ · mol−1
- ^ ΔfH°, -472.4 kJ · mol−1
- ^ ΔfG°, -467.8 kJ · mol−1
- ^ S°, 68.2 J · K−1 · mol−1
- ^ Cp°, 48.70 J · K−1 · mol−1
- ^ ΔfH°, 109. kJ · mol−1
- ^ ΔfH°, -436.747 kJ · mol−1
- ^ ΔfG°, -409.14 kJ · mol−1
- ^ S°, 82.59 J · K−1 · mol−1
- ^ Cp°, 51.30 J · K−1 · mol−1
- ^ ΔfH°, -214.14 kJ · mol−1
- ^ ΔfG°, -233.0 kJ · mol−1
- ^ S°, 239.10 J · K−1 · mol−1
- ^ Cp°, 36.48 J · K−1 · mol−1
- ^ ΔfH°, -419.53 kJ · mol−1
- ^ ΔfG°, -414.49 kJ · mol−1
- ^ S°, 159.0 J · K−1 · mol−1
- ^ Cp°, -114.6 J · K−1 · mol−1