KH2PO4 → H+ + KHPO4−
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- Electrolytic dissociation of potassium dihydrogenphosphate
- KH2PO4Potassium dihydrogenphosphateH+Hydrogen ion + KHPO4−Potassium hydrogenphosphate ion⟶
Electrolytic dissociation of potassium dihydrogenphosphate yields hydrogen ion and potassium hydrogenphosphate ion (Other reactions are here). This reaction is an acid-base reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Electrolytic dissociation of potassium dihydrogenphosphate
- KH2PO4Potassium dihydrogenphosphateH+Hydrogen ion + KHPO4−Potassium hydrogenphosphate ion⟶
General equation
- Electrolytic dissociation of salt
- SaltLewis conjugate ⟶ CationLewis acid + AnionLewis base
Oxidation state of each atom
- Electrolytic dissociation of potassium dihydrogenphosphate
Reactants
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| KH2PO4 | Potassium dihydrogenphosphate | 1 | Lewis conjugate | Salt |
Products
| Chemical formula | Name | Coefficient | Type | Type in general equation |
|---|---|---|---|---|
| H+ | Hydrogen ion | 1 | Lewis acid | Cation |
| KHPO4− | Potassium hydrogenphosphate ion | 1 | Lewis base | Anion |
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 |
|---|---|---|---|---|
| KH2PO4 (cr) | -1568.33[1] | -1415.85[1] | 134.85[1] | 116.57[1] |
| KH2PO4 (ai) | -1548.67[1] | -1413.55[1] | 192.9[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 |
|---|---|---|---|---|
| H+ (g) | 1536.202[1] | – | – | – |
| H+ (ao) | 0[1] | 0[1] | 0[1] | 0[1] |
| KHPO4− | – | – | – | – |
* (g):Gas, (ao):Un-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°, -1568.33 kJ · mol−1
- ^ ΔfG°, -1415.85 kJ · mol−1
- ^ S°, 134.85 J · K−1 · mol−1
- ^ Cp°, 116.57 J · K−1 · mol−1
- ^ ΔfH°, -1548.67 kJ · mol−1
- ^ ΔfG°, -1413.55 kJ · mol−1
- ^ S°, 192.9 J · K−1 · mol−1
- ^ ΔfH°, 1536.202 kJ · mol−1
- ^ ΔfH°, 0 kJ · mol−1
- ^ ΔfG°, 0 kJ · mol−1
- ^ S°, 0 J · K−1 · mol−1
- ^ Cp°, 0 J · K−1 · mol−1