ZnBr2 + Rb2S 💧→ ZnS↓ + 2RbBr
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- Reaction of zinc bromide and rubidium sulfide
The reaction of zinc bromide and rubidium sulfide yields zinc sulfide and rubidium bromide. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of zinc bromide and rubidium 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 zinc bromide and rubidium sulfide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| ZnBr2 | Zinc bromide | 1 | Lewis acid | Very soluble in water |
| Rb2S | Rubidium sulfide | 1 | Lewis base | Very soluble in water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| ZnS | Zinc sulfide | 1 | Lewis conjugate | Insoluble in water |
| RbBr | Rubidium bromide | 2 | Non-redox product | – |
Thermodynamic changes
Changes in standard condition
- Reaction of zinc bromide and rubidium 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 | −305.8 | – | – | – |
per 1 mol of | −305.8 | – | – | – |
per 1 mol of | −305.8 | – | – | – |
per 1 mol of | −305.8 | – | – | – |
per 1 mol of | −152.9 | – | – | – |
Changes in aqueous solution (1)
- Reaction of zinc bromide and rubidium sulfide◆
ΔrG −140.2 kJ/mol K 3.65 × 1024 pK −24.56
| 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 | −85.0 | −140.2 | 184.5 | – |
per 1 mol of | −85.0 | −140.2 | 184.5 | – |
per 1 mol of | −85.0 | −140.2 | 184.5 | – |
per 1 mol of | −85.0 | −140.2 | 184.5 | – |
per 1 mol of | −42.5 | −70.10 | 92.25 | – |
Changes in aqueous solution (2)
- Reaction of zinc bromide and rubidium sulfide◆
ΔrG −145.8 kJ/mol K 3.49 × 1025 pK −25.54
| 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 | – | −145.8 | – | – |
per 1 mol of | – | −145.8 | – | – |
per 1 mol of | – | −145.8 | – | – |
per 1 mol of | – | −145.8 | – | – |
per 1 mol of | – | −72.90 | – | – |
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 |
|---|---|---|---|---|
| ZnBr2 (cr) | -328.65[1] | -312.13[1] | 138.5[1] | – |
| ZnBr2 (ai) | -396.98[1] | -354.97[1] | 52.7[1] | -238[1] |
| ZnBr2 (ao) | – | -349.4[1] | – | – |
| ZnBr2 (cr) 2 hydrate | -937.2[1] | -799.5[1] | 198.7[1] | – |
| Rb2S (cr) | -360.7[1] | – | – | – |
| Rb2S (ai) | -469.4[1] | -482.0[1] | 228.4[1] | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-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 |
|---|---|---|---|---|
| ZnS (cr) | -205.98[1] | -201.29[1] | 57.7[1] | 46.0[1] |
| RbBr (cr) | -394.59[1] | -381.79[1] | 109.96[1] | 52.84[1] |
| RbBr (g) | -182.8[1] | -215.1[1] | 261.02[1] | 37.20[1] |
| RbBr (ai) | -372.71[1] | -387.94[1] | 203.93[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°, -328.65 kJ · mol−1
- ^ ΔfG°, -312.13 kJ · mol−1
- ^ S°, 138.5 J · K−1 · mol−1
- ^ ΔfH°, -396.98 kJ · mol−1
- ^ ΔfG°, -354.97 kJ · mol−1
- ^ S°, 52.7 J · K−1 · mol−1
- ^ Cp°, -238. J · K−1 · mol−1
- ^ ΔfG°, -349.4 kJ · mol−1
- ^ ΔfH°, -937.2 kJ · mol−1
- ^ ΔfG°, -799.5 kJ · mol−1
- ^ S°, 198.7 J · K−1 · mol−1
- ^ ΔfH°, -360.7 kJ · mol−1
- ^ ΔfH°, -469.4 kJ · mol−1
- ^ ΔfG°, -482.0 kJ · mol−1
- ^ S°, 228.4 J · K−1 · mol−1
- ^ ΔfH°, -205.98 kJ · mol−1
- ^ ΔfG°, -201.29 kJ · mol−1
- ^ S°, 57.7 J · K−1 · mol−1
- ^ Cp°, 46.0 J · K−1 · mol−1
- ^ ΔfH°, -394.59 kJ · mol−1
- ^ ΔfG°, -381.79 kJ · mol−1
- ^ S°, 109.96 J · K−1 · mol−1
- ^ Cp°, 52.84 J · K−1 · mol−1
- ^ ΔfH°, -182.8 kJ · mol−1
- ^ ΔfG°, -215.1 kJ · mol−1
- ^ S°, 261.02 J · K−1 · mol−1
- ^ Cp°, 37.20 J · K−1 · mol−1
- ^ ΔfH°, -372.71 kJ · mol−1
- ^ ΔfG°, -387.94 kJ · mol−1
- ^ S°, 203.93 J · K−1 · mol−1