You-iggy

3KHCO3 + H3AsO4 🔥→ K3AsO4 + 3CO2↑ + 3H2O

The reaction of potassium hydrogencarbonate and arsenic acid yields potassium arsenate, carbon dioxide, and water (Other reactions are here). 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 reactions
  5. 5Related categories

Reaction data

Chemical equation

General equation

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
KHCO3Potassium hydrogencarbonate3
Brønsted base
Salt of volatile acid
H3AsO4Arsenic acid1
Brønsted acid
Nonvolatile acid

Products

Chemical formulaNameCoefficientTypeType in general
equation
K3AsO4Potassium arsenate1
Conjugate base
Salt of non volatile acid
CO2Carbon dioxide3
Volatile acidic oxide
H2OWater3
Conjugate acid
Water

Thermodynamic changes

Changes in aqueous solution (1)

Reaction of potassium hydrogencarbonate and arsenic acid
ΔrG−16.6 kJ/mol
K8.09 × 102
pK−2.91
3KHCO3Ionized aqueous solution + H3AsO4Un-ionized aqueous solution
🔥
K3AsO4Ionized aqueous solution + 3CO2Gas + 3H2OLiquid
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
52.3−16.6231
17.4−5.5377.0
per 1 mol of
52.3−16.6231
per 1 mol of
52.3−16.6231
per 1 mol of
17.4−5.5377.0
per 1 mol of
17.4−5.5377.0

Changes in aqueous solution (2)

Reaction of potassium hydrogencarbonate and arsenic acid
ΔrG8.6 kJ/mol
K0.31 × 10−1
pK1.51
3KHCO3Ionized aqueous solution + H3AsO4Un-ionized aqueous solution
🔥
K3AsO4Ionized aqueous solution + 3CO2Un-ionized aqueous solution + 3H2OLiquid
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
−8.58.6−58
−2.82.9−19
per 1 mol of
−8.58.6−58
per 1 mol of
−8.58.6−58
per 1 mol of
−2.82.9−19
per 1 mol of
−2.82.9−19

Changes in aqueous solution (3)

Reaction of potassium hydrogencarbonate and arsenic acid
3KHCO3Ionized aqueous solution + H3AsO4Aqueous solution
🔥
K3AsO4Ionized aqueous solution + 3CO2Gas + 3H2OLiquid
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
54.4
18.1
per 1 mol of
54.4
per 1 mol of
54.4
per 1 mol of
18.1
per 1 mol of
18.1

Changes in aqueous solution (4)

Reaction of potassium hydrogencarbonate and arsenic acid
3KHCO3Ionized aqueous solution + H3AsO4Aqueous solution
🔥
K3AsO4Ionized aqueous solution + 3CO2Un-ionized aqueous solution + 3H2OLiquid
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
−6.5
−2.2
per 1 mol of
−6.5
per 1 mol of
−6.5
per 1 mol of
−2.2
per 1 mol of
−2.2

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
KHCO3 (cr)-963.2[1]-863.5[1]115.5[1]
KHCO3 (ai)-944.37[1]-870.04[1]193.7[1]
H3AsO4 (cr)-906.3[1]
H3AsO4 (ao)-902.5[1]-766.0[1]184[1]
H3AsO4 (aq)-904.6[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (aq):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
K3AsO4 (ai)-1645.27[1]-1498.23[1]144.8[1]
CO2 (g)-393.509[1]-394.359[1]213.74[1]37.11[1]
CO2 (ao)-413.80[1]-385.98[1]117.6[1]
H2O (cr)
H2O (l)-285.830[1]-237.129[1]69.91[1]75.291[1]
H2O (g)-241.818[1]-228.572[1]188.825[1]33.577[1]
* (ai):Ionized aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (l):Liquid

References

List of references

  1. 1