2CaCrO4 + NaHSO4 💧→ CaSO4↓ + CaCr2O7 + NaOH
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The reaction of calcium chromate and sodium hydrogensulfate yields calcium sulfate, calcium dichromate, and sodium hydroxide (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 chromate and sodium hydrogensulfate
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 chromate and sodium hydrogensulfate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaCrO4 | Calcium chromate | 2 | Lewis acid | Soluble in water |
| NaHSO4 | Sodium hydrogensulfate | 1 | Lewis base | Very soluble in water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaSO4 | Calcium sulfate | 1 | Lewis conjugate | Slightly soluble in water |
| CaCr2O7 | Calcium dichromate | 1 | Non-redox product | – |
| NaOH | Sodium hydroxide | 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 |
|---|---|---|---|---|
| CaCrO4 (aq) | -1426.3[1] | – | – | – |
| NaHSO4 (cr) | -1125.5[1] | -992.8[1] | 113.0[1] | – |
| NaHSO4 (ai) | -1127.46[1] | -1017.80[1] | 190.8[1] | -38[1] |
| NaHSO4 (cr) 1 hydrate | -1421.7[1] | -1231.6[1] | 155[1] | – |
* (aq):Aqueous solution, (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 |
|---|---|---|---|---|
| CaSO4 (cr) insoluble, anhydrite | -1434.11[1] | -1321.79[1] | 106.7[1] | 99.66[1] |
| CaSO4 (cr) soluble, α | -1425.24[1] | -1313.42[1] | 108.4[1] | 100.21[1] |
| CaSO4 (cr) soluble, β | -1420.80[1] | -1308.98[1] | 108.4[1] | 99.04[1] |
| CaSO4 (ai) | -1452.10[1] | -1298.10[1] | -33.1[1] | – |
| CaSO4 (cr) 0.5 hydrate macrocrystalline, α | -1576.74[1] | -1436.74[1] | 130.5[1] | 119.41[1] |
| CaSO4 (cr) 0.5 hydrate microcrystalline, β | -1574.65[1] | -1435.78[1] | 134.3[1] | 124.22[1] |
| CaSO4 (cr) 2 hydrate selenite | -2022.63[1] | -1797.28[1] | 194.1[1] | 186.02[1] |
| CaCr2O7 | – | – | – | – |
| NaOH (cr) | -425.609[1] | -379.494[1] | 64.455[1] | 59.54[1] |
| NaOH (g) | -207.1[1] | -210.0[1] | 228.43[1] | 48.37[1] |
| NaOH (ai) | -470.114[1] | -419.150[1] | 48.1[1] | -102.1[1] |
| NaOH (cr) 1 hydrate | -734.543[1] | -629.338[1] | 99.50[1] | 90.17[1] |
| NaOH (l) 2 hydrate | -1019.076[1] | -873.091[1] | 195.979[1] | 239.41[1] |
| NaOH (l) 3.5 hydrate | -1459.798[1] | -1236.356[1] | 286.089[1] | 354.43[1] |
| NaOH (l) 4 hydrate | -1605.15[1] | -1356.64[1] | 318.70[1] | – |
| NaOH (l) 5 hydrate | -1894.31[1] | -1596.34[1] | 386.06[1] | – |
| NaOH (l) 7 hydrate | -2469.02[1] | -2073.80[1] | 526.31[1] | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (l):Liquid
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°, -1426.3 kJ · mol−1
- ^ ΔfH°, -1125.5 kJ · mol−1
- ^ ΔfG°, -992.8 kJ · mol−1
- ^ S°, 113.0 J · K−1 · mol−1
- ^ ΔfH°, -1127.46 kJ · mol−1
- ^ ΔfG°, -1017.80 kJ · mol−1
- ^ S°, 190.8 J · K−1 · mol−1
- ^ Cp°, -38. J · K−1 · mol−1
- ^ ΔfH°, -1421.7 kJ · mol−1
- ^ ΔfG°, -1231.6 kJ · mol−1
- ^ S°, 155. J · K−1 · mol−1
- ^ ΔfH°, -1434.11 kJ · mol−1
- ^ ΔfG°, -1321.79 kJ · mol−1
- ^ S°, 106.7 J · K−1 · mol−1
- ^ Cp°, 99.66 J · K−1 · mol−1
- ^ ΔfH°, -1425.24 kJ · mol−1
- ^ ΔfG°, -1313.42 kJ · mol−1
- ^ S°, 108.4 J · K−1 · mol−1
- ^ Cp°, 100.21 J · K−1 · mol−1
- ^ ΔfH°, -1420.80 kJ · mol−1
- ^ ΔfG°, -1308.98 kJ · mol−1
- ^ S°, 108.4 J · K−1 · mol−1
- ^ Cp°, 99.04 J · K−1 · mol−1
- ^ ΔfH°, -1452.10 kJ · mol−1
- ^ ΔfG°, -1298.10 kJ · mol−1
- ^ S°, -33.1 J · K−1 · mol−1
- ^ ΔfH°, -1576.74 kJ · mol−1
- ^ ΔfG°, -1436.74 kJ · mol−1
- ^ S°, 130.5 J · K−1 · mol−1
- ^ Cp°, 119.41 J · K−1 · mol−1
- ^ ΔfH°, -1574.65 kJ · mol−1
- ^ ΔfG°, -1435.78 kJ · mol−1
- ^ S°, 134.3 J · K−1 · mol−1
- ^ Cp°, 124.22 J · K−1 · mol−1
- ^ ΔfH°, -2022.63 kJ · mol−1
- ^ ΔfG°, -1797.28 kJ · mol−1
- ^ S°, 194.1 J · K−1 · mol−1
- ^ Cp°, 186.02 J · K−1 · mol−1
- ^ ΔfH°, -425.609 kJ · mol−1
- ^ ΔfG°, -379.494 kJ · mol−1
- ^ S°, 64.455 J · K−1 · mol−1
- ^ Cp°, 59.54 J · K−1 · mol−1
- ^ ΔfH°, -207.1 kJ · mol−1
- ^ ΔfG°, -210.0 kJ · mol−1
- ^ S°, 228.43 J · K−1 · mol−1
- ^ Cp°, 48.37 J · K−1 · mol−1
- ^ ΔfH°, -470.114 kJ · mol−1
- ^ ΔfG°, -419.150 kJ · mol−1
- ^ S°, 48.1 J · K−1 · mol−1
- ^ Cp°, -102.1 J · K−1 · mol−1
- ^ ΔfH°, -734.543 kJ · mol−1
- ^ ΔfG°, -629.338 kJ · mol−1
- ^ S°, 99.50 J · K−1 · mol−1
- ^ Cp°, 90.17 J · K−1 · mol−1
- ^ ΔfH°, -1019.076 kJ · mol−1
- ^ ΔfG°, -873.091 kJ · mol−1
- ^ S°, 195.979 J · K−1 · mol−1
- ^ Cp°, 239.41 J · K−1 · mol−1
- ^ ΔfH°, -1459.798 kJ · mol−1
- ^ ΔfG°, -1236.356 kJ · mol−1
- ^ S°, 286.089 J · K−1 · mol−1
- ^ Cp°, 354.43 J · K−1 · mol−1
- ^ ΔfH°, -1605.15 kJ · mol−1
- ^ ΔfG°, -1356.64 kJ · mol−1
- ^ S°, 318.70 J · K−1 · mol−1
- ^ ΔfH°, -1894.31 kJ · mol−1
- ^ ΔfG°, -1596.34 kJ · mol−1
- ^ S°, 386.06 J · K−1 · mol−1
- ^ ΔfH°, -2469.02 kJ · mol−1
- ^ ΔfG°, -2073.80 kJ · mol−1
- ^ S°, 526.31 J · K−1 · mol−1