Ag2CrO4 + 2HI → 2AgI + H2CrO4
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The reaction of silver(I) chromate and hydrogen iodide yields silver(I) iodide and chromic acid (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 silver(I) chromate and hydrogen iodide
General equation
- Salt of weak acidBrønsted base + Strong acidBrønsted acid ⟶ Salt of strong acidConjugate base + Weak acidConjugate acid
Oxidation state of each atom
- Reaction of silver(I) chromate and hydrogen iodide
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ag2CrO4 | Silver(I) chromate | 1 | Brønsted base | Salt of weak acid |
| HI | Hydrogen iodide | 2 | Brønsted acid | Strong acid |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| AgI | Silver(I) iodide | 2 | Conjugate base | Salt of strong acid |
| H2CrO4 | Chromic acid | 1 | Conjugate acid | Weak acid |
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 |
|---|---|---|---|---|
| Ag2CrO4 (cr) | -731.74[1] | -641.76[1] | 217.6[1] | 142.26[1] |
| Ag2CrO4 (ai) | -669.98[1] | -573.52[1] | 195.8[1] | – |
| HI (g) | 26.48[1] | 1.70[1] | 206.594[1] | 29.158[1] |
| HI (ai) | -55.19[1] | -51.57[1] | 111.3[1] | -142.3[1] |
* (cr):Crystalline solid, (ai):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 |
|---|---|---|---|---|
| AgI (cr) | -61.84[1] | -66.19[1] | 115.5[1] | 56.82[1] |
| AgI (ai) | 50.38[1] | 25.52[1] | 184.1[1] | -120.5[1] |
| AgI (ao) | – | -12.1[1] | – | – |
| H2CrO4 | – | – | – | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-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°, -731.74 kJ · mol−1
- ^ ΔfG°, -641.76 kJ · mol−1
- ^ S°, 217.6 J · K−1 · mol−1
- ^ Cp°, 142.26 J · K−1 · mol−1
- ^ ΔfH°, -669.98 kJ · mol−1
- ^ ΔfG°, -573.52 kJ · mol−1
- ^ S°, 195.8 J · K−1 · mol−1
- ^ ΔfH°, 26.48 kJ · mol−1
- ^ ΔfG°, 1.70 kJ · mol−1
- ^ S°, 206.594 J · K−1 · mol−1
- ^ Cp°, 29.158 J · K−1 · mol−1
- ^ ΔfH°, -55.19 kJ · mol−1
- ^ ΔfG°, -51.57 kJ · mol−1
- ^ S°, 111.3 J · K−1 · mol−1
- ^ Cp°, -142.3 J · K−1 · mol−1
- ^ ΔfH°, -61.84 kJ · mol−1
- ^ ΔfG°, -66.19 kJ · mol−1
- ^ S°, 115.5 J · K−1 · mol−1
- ^ Cp°, 56.82 J · K−1 · mol−1
- ^ ΔfH°, 50.38 kJ · mol−1
- ^ ΔfG°, 25.52 kJ · mol−1
- ^ S°, 184.1 J · K−1 · mol−1
- ^ Cp°, -120.5 J · K−1 · mol−1
- ^ ΔfG°, -12.1 kJ · mol−1