PbBr2 + 2Br− → [PbBr4]2−
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- Reaction of lead(II) bromide and bromide ion
The reaction of lead(II) bromide and bromide ion yields tetrabromidoplumbate(II) ion (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of lead(II) bromide and bromide ion
General equation
- Reaction of neutral species and anion
- CompoundLewis acid + AnionLewis base ⟶ AnionLewis conjugate
Oxidation state of each atom
- Reaction of lead(II) bromide and bromide ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| PbBr2 | Lead(II) bromide | 1 | Lewis acid | Compound |
| Br− | Bromide ion | 2 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| [PbBr4]2− | Tetrabromidoplumbate(II) ion | 1 | Lewis conjugate | Anion |
Thermodynamic changes
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 |
|---|---|---|---|---|
| PbBr2 (cr) | -278.7[1] | -261.92[1] | 161.5[1] | 80.12[1] |
| PbBr2 (ai) | -244.8[1] | -232.34[1] | 175.3[1] | – |
| PbBr2 (ao) | – | -240.6[1] | – | – |
| Br− (g) | -219.07[1] | – | – | – |
| Br− (ao) | -121.55[1] | -103.96[1] | 82.4[1] | -141.8[1] |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (g):Gas
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 |
|---|---|---|---|---|
| [PbBr4]2− | – | – | – | – |
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°, -278.7 kJ · mol−1
- ^ ΔfG°, -261.92 kJ · mol−1
- ^ S°, 161.5 J · K−1 · mol−1
- ^ Cp°, 80.12 J · K−1 · mol−1
- ^ ΔfH°, -244.8 kJ · mol−1
- ^ ΔfG°, -232.34 kJ · mol−1
- ^ S°, 175.3 J · K−1 · mol−1
- ^ ΔfG°, -240.6 kJ · mol−1
- ^ ΔfH°, -219.07 kJ · mol−1
- ^ ΔfH°, -121.55 kJ · mol−1
- ^ ΔfG°, -103.96 kJ · mol−1
- ^ S°, 82.4 J · K−1 · mol−1
- ^ Cp°, -141.8 J · K−1 · mol−1