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3CH3COONH4 + H3AsO4 🔥→ (NH4)3AsO4 + 3CH3COOH

The reaction of ammonium acetate and arsenic acid yields ammonium arsenate and acetic 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
CH3COONH4Ammonium acetate3
Brønsted base
Salt of volatile acid
H3AsO4Arsenic acid1
Brønsted acid
Nonvolatile acid

Products

Chemical formulaNameCoefficientTypeType in general
equation
(NH4)3AsO4Ammonium arsenate1
Conjugate base
Salt of non volatile acid
CH3COOHAcetic acid3
Conjugate acid
Volatile acid

Thermodynamic changes

Changes in standard condition

Reaction of ammonium acetate and arsenic acid
3CH3COONH4Crystalline solid + H3AsO4Crystalline solid
🔥
(NH4)3AsO4Crystalline solid + 3CH3COOHLiquid
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
15.0
per 1 mol of
5.00
per 1 mol of
15.0
per 1 mol of
15.0
per 1 mol of
5.00

Changes in aqueous solution (1)

Reaction of ammonium acetate and arsenic acid
ΔrG36.1 kJ/mol
K0.47 × 10−6
pK6.32
3CH3COONH4Ionized aqueous solution + H3AsO4Un-ionized aqueous solution
🔥
(NH4)3AsO4Ionized aqueous solution + 3CH3COOHUn-ionized aqueous solution
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
15.136.1−71
per 1 mol of
5.0312.0−24
per 1 mol of
15.136.1−71
per 1 mol of
15.136.1−71
per 1 mol of
5.0312.0−24

Changes in aqueous solution (2)

Reaction of ammonium acetate and arsenic acid
3CH3COONH4Ionized aqueous solution + H3AsO4Aqueous solution
🔥
(NH4)3AsO4Ionized aqueous solution + 3CH3COOHUn-ionized aqueous solution
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
17.2
per 1 mol of
5.73
per 1 mol of
17.2
per 1 mol of
17.2
per 1 mol of
5.73

Changes in aqueous solution (3)

Reaction of ammonium acetate and arsenic acid
ΔrG117.6 kJ/mol
K0.25 × 10−20
pK20.60
3CH3COONH4Ionized aqueous solution + H3AsO4Un-ionized aqueous solution
🔥
(NH4)3AsO4Ionized aqueous solution + 3CH3COOHIonized aqueous solution
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
14.4117.6−347
per 1 mol of
4.8039.20−116
per 1 mol of
14.4117.6−347
per 1 mol of
14.4117.6−347
per 1 mol of
4.8039.20−116

Changes in aqueous solution (4)

Reaction of ammonium acetate and arsenic acid
3CH3COONH4Ionized aqueous solution + H3AsO4Aqueous solution
🔥
(NH4)3AsO4Ionized aqueous solution + 3CH3COOHIonized aqueous solution
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
16.5
per 1 mol of
5.50
per 1 mol of
16.5
per 1 mol of
16.5
per 1 mol of
5.50

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
CH3COONH4 (cr)-616.14[1]
CH3COONH4 (ai)-618.52[1]-448.61[1]200.0[1]73.6[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
(NH4)3AsO4 (cr)-1286.2[1]
(NH4)3AsO4 (ai)-1285.66[1]-886.32[1]177.4[1]
(NH4)3AsO4 (cr)
3 hydrate
-2166.9[1]
CH3COOH (l)-484.5[1]-389.9[1]159.8[1]124.3[1]
CH3COOH (g)-432.25[1]-374.0[1]282.5[1]66.5[1]
CH3COOH (ai)-486.01[1]-369.31[1]86.6[1]-6.3[1]
CH3COOH (ao)-485.76[1]-396.46[1]178.7[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (l):Liquid, (g):Gas, (ao):Un-ionized aqueous solution

References

List of references

  1. 1