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2AgF + H2SO4 → Ag2SO4↓ + 2HF↑

The reaction of silver(I) fluoride and sulfuric acid yields silver(I) sulfate and hydrogen fluoride. 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
AgFSilver(I) fluoride2
Brønsted base
Lewis acid
Salt of volatile acid
Very soluble in water
H2SO4Sulfuric acid1
Brønsted acid
Lewis base
Nonvolatile acid
Miscible with water

Products

Chemical formulaNameCoefficientTypeType in general
equation
Ag2SO4Silver(I) sulfate1
Conjugate base
Lewis conjugate
Salt of non volatile acid
Slightly soluble in water
HFHydrogen fluoride2
Conjugate acid
Non-redox product
Volatile acid

Thermodynamic changes

Changes in standard condition

Reaction of silver(I) fluoride and sulfuric acid
2AgFCrystalline solid + H2SO4Liquid
Ag2SO4Crystalline solid + 2HFGas
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
−34.9
per 1 mol of
−17.4
per 1 mol of
−34.9
per 1 mol of
−34.9
per 1 mol of
−17.4

Changes in aqueous solution (1)

Reaction of silver(I) fluoride and sulfuric acid
ΔrG11.2 kJ/mol
K0.11 × 10−1
pK1.96
2AgFIonized aqueous solution + H2SO4Ionized aqueous solution
Ag2SO4Ionized aqueous solution + 2HFGas
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
123.111.2375.2270
per 1 mol of
61.555.60187.6135
per 1 mol of
123.111.2375.2270
per 1 mol of
123.111.2375.2270
per 1 mol of
61.555.60187.6135

Changes in aqueous solution (2)

Reaction of silver(I) fluoride and sulfuric acid
ΔrG−36.03 kJ/mol
K2.05 × 106
pK−6.31
2AgFIonized aqueous solution + H2SO4Ionized aqueous solution
Ag2SO4Ionized aqueous solution + 2HFUn-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
25.15−36.03205.0
per 1 mol of
12.57−18.02102.5
per 1 mol of
25.15−36.03205.0
per 1 mol of
25.15−36.03205.0
per 1 mol of
12.57−18.02102.5

Changes in aqueous solution (3)

Reaction of silver(I) fluoride and sulfuric acid
ΔrG−36.03 kJ/mol
K2.05 × 106
pK−6.31
2AgFIonized aqueous solution + H2SO4Ionized aqueous solution
Ag2SO4Ionized aqueous solution + 2HFUn-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
25.15−36.03205.0
per 1 mol of
12.57−18.02102.5
per 1 mol of
25.15−36.03205.0
per 1 mol of
25.15−36.03205.0
per 1 mol of
12.57−18.02102.5

Changes in aqueous solution (4)

Reaction of silver(I) fluoride and sulfuric acid
ΔrG15.2 kJ/mol
K0.22 × 10−2
pK2.66
2AgFUn-ionized aqueous solution + H2SO4Ionized aqueous solution
Ag2SO4Ionized aqueous solution + 2HFGas
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
146.815.2441.4
per 1 mol of
73.407.60220.7
per 1 mol of
146.815.2441.4
per 1 mol of
146.815.2441.4
per 1 mol of
73.407.60220.7

Changes in aqueous solution (5)

Reaction of silver(I) fluoride and sulfuric acid
ΔrG−32.0 kJ/mol
K4.04 × 105
pK−5.61
2AgFUn-ionized aqueous solution + H2SO4Ionized aqueous solution
Ag2SO4Ionized aqueous solution + 2HFUn-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
48.8−32.0271.2
per 1 mol of
24.4−16.0135.6
per 1 mol of
48.8−32.0271.2
per 1 mol of
48.8−32.0271.2
per 1 mol of
24.4−16.0135.6

Changes in aqueous solution (6)

Reaction of silver(I) fluoride and sulfuric acid
ΔrG−32.0 kJ/mol
K4.04 × 105
pK−5.61
2AgFUn-ionized aqueous solution + H2SO4Ionized aqueous solution
Ag2SO4Ionized aqueous solution + 2HFUn-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
48.8−32.0271.2
per 1 mol of
24.4−16.0135.6
per 1 mol of
48.8−32.0271.2
per 1 mol of
48.8−32.0271.2
per 1 mol of
24.4−16.0135.6

Changes in aqueous solution (7)

Reaction of silver(I) fluoride and sulfuric acid
ΔrG0.03 kJ/mol
K0.99 × 100
pK0.01
2AgFIonized aqueous solution + H2SO4Ionized aqueous solution
Ag2SO4Ionized aqueous solution + 2HFIonized 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
0.050.030.0−2
per 1 mol of
0.02500.01500.0−1
per 1 mol of
0.05000.03000.0−2
per 1 mol of
0.05000.03000.0−2
per 1 mol of
0.02500.01500.0−1

Changes in aqueous solution (8)

Reaction of silver(I) fluoride and sulfuric acid
ΔrG4.0 kJ/mol
K0.20 × 100
pK0.70
2AgFUn-ionized aqueous solution + H2SO4Ionized aqueous solution
Ag2SO4Ionized aqueous solution + 2HFIonized 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
23.74.066.2
per 1 mol of
11.82.033.1
per 1 mol of
23.74.066.2
per 1 mol of
23.74.066.2
per 1 mol of
11.82.033.1

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
AgF (cr)-204.6[1]
AgF (ai)-227.07[1]-201.69[1]59.0[1]-84.9[1]
AgF (ao)-238.9[1]-203.7[1]25.9[1]
AgF (cr)
2 hydrate
-800.8[1]-671.0[1]174.9[1]130[1]
AgF (cr)
4 hydrate
-1388.3[1]-1147.0[1]268[1]209[1]
H2SO4 (cr)
H2SO4 (l)-813.989[1]-690.003[1]156.904[1]138.91[1]
H2SO4 (ai)-909.27[1]-744.53[1]20.1[1]-293[1]
H2SO4 (l)
1 hydrate
-1127.621[1]-950.383[1]211.54[1]214.85[1]
H2SO4 (l)
2 hydrate
-1427.100[1]-1199.650[1]276.40[1]260.83[1]
H2SO4 (l)
3 hydrate
-1720.402[1]-1443.980[1]345.39[1]318.95[1]
H2SO4 (l)
4 hydrate
-2011.199[1]-1685.863[1]414.59[1]382.21[1]
H2SO4 (l)
6.5 hydrate
-2733.256[1]-2285.734[1]587.89[1]570.28[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution, (l):Liquid

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
Ag2SO4 (cr)-715.88[1]-618.41[1]200.4[1]131.38[1]
Ag2SO4 (ai)-698.10[1]-590.30[1]165.7[1]-251[1]
HF (l)
x denotes undetermined zero point entropy
-299.78[1]75.40+x[1]
HF (g)-271.1[1]-273.2[1]173.779[1]29.133[1]
HF (ai)-332.63[1]-278.79[1]-13.8[1]-106.7[1]
HF (ao)-320.08[1]-296.82[1]88.7[1]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (l):Liquid, (g):Gas, (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)