Sr2+ + HPO42− → SrHPO4↓
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- Reaction of strontium ion and hydrogenphosphate ion
- Sr2+Strontium ion + HPO42−Hydrogenphosphate ionSrHPO4↓Strontium hydrogenphosphate⟶
The reaction of strontium ion and hydrogenphosphate ion yields strontium hydrogenphosphate. This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Reaction of strontium ion and hydrogenphosphate ion
- Sr2+Strontium ion + HPO42−Hydrogenphosphate ionSrHPO4↓Strontium hydrogenphosphate⟶
General equation
- Reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ ProductLewis conjugate + (H2O)
- Precipitation reaction of cation and anion
- CationLewis acid + AnionLewis base ⟶ Insoluble in water/Very slightly soluble in water/Slightly soluble in waterLewis conjugate + (H2O)
Oxidation state of each atom
- Reaction of strontium ion and hydrogenphosphate ion
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| Sr2+ | Strontium ion | 1 | Lewis acid | Cation |
| HPO42− | Hydrogenphosphate ion | 1 | Lewis base | Anion |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| SrHPO4 | Strontium hydrogenphosphate | 1 | Lewis conjugate | – Insoluble in water |
Thermodynamic changes
Changes in standard condition
- Reaction of strontium ion and hydrogenphosphate ion◆
ΔrG −40.0 kJ/mol K 1.02 × 107 pK −7.01 - Sr2+Un-ionized aqueous solution + HPO42−Un-ionized aqueous solutionSrHPO4↓Crystalline solid⟶
| 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 | 16.2 | −40.0 | 187 | – |
per 1 mol of Strontium ion | 16.2 | −40.0 | 187 | – |
per 1 mol of Hydrogenphosphate ion | 16.2 | −40.0 | 187 | – |
per 1 mol of Strontium hydrogenphosphate | 16.2 | −40.0 | 187 | – |
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 |
|---|---|---|---|---|
| Sr2+ (g) | 1790.54[1] | – | – | – |
| Sr2+ (ao) | -545.80[1] | -559.48[1] | -32.6[1] | – |
| HPO42− (ao) | -1292.14[1] | -1089.15[1] | -33.5[1] | – |
* (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 |
|---|---|---|---|---|
| SrHPO4 (cr) | -1821.7[1] | -1688.6[1] | 121[1] | – |
* (cr):Crystalline solid
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)