3Mg(HCO3)2 + 2(NH4)3PO4 💧→ Mg3(PO4)2↓ + 3(NH4)2CO3 + 3H2CO3
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The reaction of magnesium hydrogencarbonate and ammonium phosphate yields magnesium phosphate, ammonium carbonate, and carbonic 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 magnesium hydrogencarbonate and ammonium phosphate
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 magnesium hydrogencarbonate and ammonium phosphate
Reactants
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
Mg(HCO3)2 | Magnesium hydrogencarbonate | 3 | Lewis acid | Soluble in water |
(NH4)3PO4 | Ammonium phosphate | 2 | Lewis base | Soluble in water |
Products
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
Mg3(PO4)2 | Magnesium phosphate | 1 | Lewis conjugate | Very slightly soluble in water |
(NH4)2CO3 | Ammonium carbonate | 3 | Non-redox product | – |
H2CO3 | Carbonic acid | 3 | 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 |
---|---|---|---|---|
Mg(HCO3)2 | – | – | – | – |
(NH4)3PO4 (cr) | -1671.9[1] | – | – | – |
(NH4)3PO4 (ai) | -1674.9[1] | -1256.6[1] | 117[1] | – |
(NH4)3PO4 (cr) 3 hydrate | -2555.6[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 |
---|---|---|---|---|
Mg3(PO4)2 (cr) | -3780.7[1] | -3538.7[1] | 189.20[1] | 213.47[1] |
(NH4)2CO3 (ai) | -942.15[1] | -686.42[1] | 169.9[1] | – |
H2CO3 (ao) | -699.65[1] | -623.08[1] | 187.4[1] | – |
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (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°, -1671.9 kJ · mol−1
- ^ ΔfH°, -1674.9 kJ · mol−1
- ^ ΔfG°, -1256.6 kJ · mol−1
- ^ S°, 117. J · K−1 · mol−1
- ^ ΔfH°, -2555.6 kJ · mol−1
- ^ ΔfH°, -3780.7 kJ · mol−1
- ^ ΔfG°, -3538.7 kJ · mol−1
- ^ S°, 189.20 J · K−1 · mol−1
- ^ Cp°, 213.47 J · K−1 · mol−1
- ^ ΔfH°, -942.15 kJ · mol−1
- ^ ΔfG°, -686.42 kJ · mol−1
- ^ S°, 169.9 J · K−1 · mol−1
- ^ ΔfH°, -699.65 kJ · mol−1
- ^ ΔfG°, -623.08 kJ · mol−1
- ^ S°, 187.4 J · K−1 · mol−1