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H[AuCl4] + NH3 → NH4Cl + AuCl3

The reaction of tetrachloridoauric(III) acid and ammonia yields ammonium chloride and gold(III) chloride. 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

Reaction of acid and base
AcidBrønsted acid + BaseBrønsted base
SaltConjugate base + (H2O)(Conjugate acid)
Reaction of acid and non hydroxide base
AcidBrønsted acid + Non hydroxide baseBrønsted base
SaltConjugate acid base
Reaction of strong acid and weak base
Strong acidBrønsted acid + Weak baseBrønsted base
Salt of strong acid and weak baseConjugate base + (H2O)(Conjugate acid)

Oxidation state of each atom

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
H[AuCl4]Tetrachloridoauric(III) acid1
Brønsted acid
Acid
Strong acid
NH3Ammonia1
Brønsted base
Base
Non hydroxide base
Weak base

Products

Chemical formulaNameCoefficientTypeType in general
equation
NH4ClAmmonium chloride1
Conjugate base
Conjugate acid base
Salt
Salt of strong acid and weak base
AuCl3Gold(III) chloride1
Conjugate base
Conjugate acid base
Salt
Salt of strong acid and weak base

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
H[AuCl4]
NH3 (g)-46.11[1]-16.45[1]192.45[1]35.06[1]
NH3 (ao)-80.29[1]-26.50[1]111.3[1]
* (g):Gas, (ao):Un-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
NH4Cl (cr)-314.43[1]-202.87[1]94.6[1]84.1[1]
NH4Cl (ai)-299.66[1]-210.52[1]169.9[1]-56.5[1]
AuCl3 (cr)-117.6[1]
AuCl3 (cr)
2 hydrate
-715.0[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution

References

List of references

  1. 1