Ca(NO3)2 + K2SiO3 💧→ CaSiO3↓ + 2KNO3
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The reaction of calcium nitrate and potassium metasilicate yields calcium metasilicate and potassium nitrate. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of calcium nitrate and potassium metasilicate
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 nitrate and potassium metasilicate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Ca(NO3)2 | Calcium nitrate | 1 | Lewis acid | Very soluble in water |
| K2SiO3 | Potassium metasilicate | 1 | Lewis base | Soluble in water |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| CaSiO3 | Calcium metasilicate | 1 | Lewis conjugate | Insoluble in water |
| KNO3 | Potassium nitrate | 2 | Non-redox product | – |
Thermodynamic changes
Changes in standard condition (1)
- Reaction of calcium nitrate and potassium metasilicate
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | – | – | 8.7 | 10.3 |
per 1 mol of | – | – | 8.7 | 10.3 |
per 1 mol of | – | – | 8.7 | 10.3 |
per 1 mol of | – | – | 8.7 | 10.3 |
per 1 mol of | – | – | 4.3 | 5.15 |
Changes in standard condition (2)
- Reaction of calcium nitrate and potassium metasilicate
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | – | – | 14.2 | 11.5 |
per 1 mol of | – | – | 14.2 | 11.5 |
per 1 mol of | – | – | 14.2 | 11.5 |
per 1 mol of | – | – | 14.2 | 11.5 |
per 1 mol of | – | – | 7.10 | 5.75 |
Changes in aqueous solution
- Reaction of calcium nitrate and potassium metasilicate
| Standard enthalpy of reaction ΔrH° kJ · mol−1 | Standard Gibbs energy of reaction ΔrG° kJ · mol−1 | Standard entropy of reaction ΔrS° J · K−1 · mol−1 | Standard heat capacity of reaction at constant pressure ΔrCp° J · K−1 · mol−1 | |
|---|---|---|---|---|
per 1 mol of Equation | – | – | 194.0 | – |
per 1 mol of | – | – | 194.0 | – |
per 1 mol of | – | – | 194.0 | – |
per 1 mol of | – | – | 194.0 | – |
per 1 mol of | – | – | 97.00 | – |
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 |
|---|---|---|---|---|
| Ca(NO3)2 (cr) | -938.39[1] | -743.07[1] | 193.3[1] | 149.37[1] |
| Ca(NO3)2 (ai) | -957.55[1] | -776.09[1] | 239.7[1] | – |
| Ca(NO3)2 (cr) 2 hydrate | -1540.76[1] | -1229.11[1] | 269.4[1] | – |
| Ca(NO3)2 (cr) 3 hydrate | -1838.0[1] | -1471.7[1] | 319.2[1] | – |
| Ca(NO3)2 (cr) 4 hydrate | -2132.33[1] | -1713.15[1] | 375.3[1] | – |
| K2SiO3 (cr) | – | – | 146.0[1] | 118.4[1] |
* (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 |
|---|---|---|---|---|
| CaSiO3 (cr) wollastonite | -1634.94[1] | -1549.66[1] | 81.92[1] | 85.27[1] |
| CaSiO3 (cr) pseudowollastonite | -1628.4[1] | -1544.7[1] | 87.36[1] | 86.48[1] |
| CaSiO3 (vit) | -1601.01[1] | – | – | – |
| KNO3 (cr) | -494.63[1] | -394.86[1] | 133.05[1] | 96.40[1] |
| KNO3 (ai) | -459.74[1] | -394.53[1] | 248.9[1] | -64.9[1] |
* (cr):Crystalline solid, (vit):Vitreous liquid, (ai):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°, -938.39 kJ · mol−1
- ^ ΔfG°, -743.07 kJ · mol−1
- ^ S°, 193.3 J · K−1 · mol−1
- ^ Cp°, 149.37 J · K−1 · mol−1
- ^ ΔfH°, -957.55 kJ · mol−1
- ^ ΔfG°, -776.09 kJ · mol−1
- ^ S°, 239.7 J · K−1 · mol−1
- ^ ΔfH°, -1540.76 kJ · mol−1
- ^ ΔfG°, -1229.11 kJ · mol−1
- ^ S°, 269.4 J · K−1 · mol−1
- ^ ΔfH°, -1838.0 kJ · mol−1
- ^ ΔfG°, -1471.7 kJ · mol−1
- ^ S°, 319.2 J · K−1 · mol−1
- ^ ΔfH°, -2132.33 kJ · mol−1
- ^ ΔfG°, -1713.15 kJ · mol−1
- ^ S°, 375.3 J · K−1 · mol−1
- ^ S°, 146.0 J · K−1 · mol−1
- ^ Cp°, 118.4 J · K−1 · mol−1
- ^ ΔfH°, -1634.94 kJ · mol−1
- ^ ΔfG°, -1549.66 kJ · mol−1
- ^ S°, 81.92 J · K−1 · mol−1
- ^ Cp°, 85.27 J · K−1 · mol−1
- ^ ΔfH°, -1628.4 kJ · mol−1
- ^ ΔfG°, -1544.7 kJ · mol−1
- ^ S°, 87.36 J · K−1 · mol−1
- ^ Cp°, 86.48 J · K−1 · mol−1
- ^ ΔfH°, -1601.01 kJ · mol−1
- ^ ΔfH°, -494.63 kJ · mol−1
- ^ ΔfG°, -394.86 kJ · mol−1
- ^ S°, 133.05 J · K−1 · mol−1
- ^ Cp°, 96.40 J · K−1 · mol−1
- ^ ΔfH°, -459.74 kJ · mol−1
- ^ ΔfG°, -394.53 kJ · mol−1
- ^ S°, 248.9 J · K−1 · mol−1
- ^ Cp°, -64.9 J · K−1 · mol−1