(NH4)2CrO4 + Ca(MnO4)2 💧→ 2NH4MnO4↓ + CaCrO4
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The reaction of ammonium chromate and calcium permanganate yields ammonium permanganate and calcium chromate. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of ammonium chromate and calcium permanganate
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 ammonium chromate and calcium permanganate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| (NH4)2CrO4 | Ammonium chromate | 1 | Lewis acid | Very soluble in water |
| Ca(MnO4)2 | Calcium permanganate | 1 | Lewis base | Very soluble in water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| NH4MnO4 | Ammonium permanganate | 2 | Lewis conjugate | Slightly soluble in water |
| CaCrO4 | Calcium chromate | 1 | Non-redox product | – |
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 |
|---|---|---|---|---|
| (NH4)2CrO4 (cr) | -1167.3[1] | – | – | – |
| (NH4)2CrO4 (ai) | -1146.16[1] | -886.36[1] | 277.0[1] | – |
| Ca(MnO4)2 | – | – | – | – |
* (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 |
|---|---|---|---|---|
| NH4MnO4 | – | – | – | – |
| CaCrO4 (aq) | -1426.3[1] | – | – | – |
* (aq):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)