11CaCr2O7 + 4H3BO3 💧→ CaB4O7↓ + 10CaCrO4 + 6H2Cr2O7
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- Reaction of calcium dichromate and boric acid
The reaction of calcium dichromate and boric acid yields calcium tetraborate, calcium chromate, and dichromic 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 calcium dichromate and boric acid
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 calcium dichromate and boric acid
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaCr2O7 | Calcium dichromate | 11 | Lewis acid | Very soluble in water |
| H3BO3 | Boric acid | 4 | Lewis base | Soluble in water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaB4O7 | Calcium tetraborate | 1 | Lewis conjugate | Slightly soluble in water |
| CaCrO4 | Calcium chromate | 10 | Non-redox product | – |
| H2Cr2O7 | Dichromic acid | 6 | 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 |
|---|---|---|---|---|
| CaCr2O7 | – | – | – | – |
| H3BO3 (cr) | -1094.33[1] | -968.92[1] | 88.83[1] | 81.38[1] |
| H3BO3 (g) | -994.1[1] | – | – | – |
| H3BO3 (ao) | -1072.32[1] | -968.75[1] | 162.3[1] | – |
* (cr):Crystalline solid, (g):Gas, (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 |
|---|---|---|---|---|
| CaB4O7 (cr) | -3360.25[1] | -3167.01[1] | 134.7[1] | 157.95[1] |
| CaB4O7 (vit) | -3307.37[1] | – | – | – |
| CaCrO4 (aq) | -1426.3[1] | – | – | – |
| H2Cr2O7 | – | – | – | – |
* (cr):Crystalline solid, (vit):Vitreous liquid, (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)
- ^ ΔfH°, -1094.33 kJ · mol−1
- ^ ΔfG°, -968.92 kJ · mol−1
- ^ S°, 88.83 J · K−1 · mol−1
- ^ Cp°, 81.38 J · K−1 · mol−1
- ^ ΔfH°, -994.1 kJ · mol−1
- ^ ΔfH°, -1072.32 kJ · mol−1
- ^ ΔfG°, -968.75 kJ · mol−1
- ^ S°, 162.3 J · K−1 · mol−1
- ^ ΔfH°, -3360.25 kJ · mol−1
- ^ ΔfG°, -3167.01 kJ · mol−1
- ^ S°, 134.7 J · K−1 · mol−1
- ^ Cp°, 157.95 J · K−1 · mol−1
- ^ ΔfH°, -3307.37 kJ · mol−1
- ^ ΔfH°, -1426.3 kJ · mol−1