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MgCl2 + Ca(HCO3)2 💧→ MgCO3↓ + CaCl2 + H2CO3

The reaction of magnesium chloride and calcium hydrogencarbonate yields magnesium carbonate, calcium chloride, and carbonic acid. This reaction is an acid-base reaction and is classified as follows:

Table of contents
  1. 1Reaction data
  2. 2Thermodynamic changes
  3. 3References
  4. 4Related categories

Reaction data

Chemical equation

General equation

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
MgCl2Magnesium chloride1
Lewis acid
Very soluble in water
Ca(HCO3)2Calcium hydrogencarbonate1
Lewis base
Soluble in water

Products

Chemical formulaNameCoefficientTypeType in general
equation
MgCO3Magnesium carbonate1
Lewis conjugate
Very slightly soluble in water
CaCl2Calcium chloride1
Non-redox product
H2CO3Carbonic acid1
Non-redox product

Thermodynamic changes

Thermodynamic data of reactants

Chemical formulaStandard 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
MgCl2 (cr)-641.32[1]-591.79[1]89.62[1]71.38[1]
MgCl2 (g)-400.4[1]
MgCl2 (ai)-801.15[1]-717.1[1]-25.1[1]
MgCl2 (cr)
1 hydrate
-966.63[1]-861.74[1]137.2[1]115.27[1]
MgCl2 (cr)
2 hydrate
-1279.72[1]-1118.00[1]179.9[1]159.20[1]
MgCl2 (cr)
4 hydrate
-1898.99[1]-1623.29[1]264.0[1]241.42[1]
MgCl2 (cr)
6 hydrate
-2499.02[1]-2114.64[1]366.1[1]315.06[1]
Ca(HCO3)2
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution

Thermodynamic data of products

Chemical formulaStandard 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
MgCO3 (cr)-1095.8[1]-1012.1[1]65.7[1]75.52[1]
MgCO3 (cr)
3 hydrate
-1726.1[1]
MgCO3 (cr)
5 hydrate
-2199.2[1]
CaCl2 (cr)-795.8[1]-748.1[1]104.6[1]72.59[1]
CaCl2 (g)-471.5[1]-479.24[1]290.27[1]59.33[1]
CaCl2 (ai)-877.13[1]-816.01[1]59.8[1]
CaCl2 (cr)
1 hydrate
-1109.2[1]
CaCl2 (cr)
2 hydrate
-1402.9[1]
CaCl2 (cr)
4 hydrate
-2009.6[1]
CaCl2 (cr)
6 hydrate
-2607.9[1]
H2CO3 (ao)-699.65[1]-623.08[1]187.4[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution

References

List of references

  1. 1
    Janiel J. Reed (1989)
    The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
    National Institute of Standards and Technology (NIST)