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2HNO3 + Zn(OH)2 → Zn(NO3)2 + 2H2O

The reaction of nitric acid and zinc hydroxide yields zinc nitrate and water. 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 hydroxide base
AcidBrønsted acid + Hydroxide baseBrønsted base
SaltConjugate base + H2OConjugate acid
Reaction of strong acid and weak base
Strong acidBrønsted acid + Weak baseBrønsted base
Salt of strong acid and weak baseConjugate base + (H2O)(Conjugate acid)
Reaction of acid and amphoteric hydroxide
AcidBrønsted acid + Amphoteric hydroxideBrønsted base
Salt of weak baseConjugate base + H2OConjugate acid

Oxidation state of each atom

Reaction of nitric acid and zinc hydroxide

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
HNO3Nitric acid2
Brønsted acid
Acid
Strong acid
Zn(OH)2Zinc hydroxide1
Brønsted base
Base
Hydroxide base
Weak base
Amphoteric hydroxide

Products

Chemical formulaNameCoefficientTypeType in general
equation
Zn(NO3)2Zinc nitrate1
Conjugate base
Salt
Salt of strong acid and weak base
Salt of weak base
H2OWater2
Conjugate acid
Water

Thermodynamic changes

Changes in standard condition (1)

Reaction of nitric acid and zinc hydroxide
2HNO3Liquid + Zn(OH)2Crystalline solidγ
Zn(NO3)2Crystalline solid + 2H2OLiquid
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
per 1 mol of
per 1 mol of
per 1 mol of
per 1 mol of

Changes in standard condition (2)

Reaction of nitric acid and zinc hydroxide
2HNO3Liquid + Zn(OH)2Crystalline solidβ
Zn(NO3)2Crystalline solid + 2H2OLiquid
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
−65.3
per 1 mol of
−32.6
per 1 mol of
−65.3
per 1 mol of
−65.3
per 1 mol of
−32.6

Changes in standard condition (3)

Reaction of nitric acid and zinc hydroxide
2HNO3Liquid + Zn(OH)2Crystalline solidε
Zn(NO3)2Crystalline solid + 2H2OLiquid
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
−63.9
per 1 mol of
−31.9
per 1 mol of
−63.9
per 1 mol of
−63.9
per 1 mol of
−31.9

Changes in standard condition (4)

Reaction of nitric acid and zinc hydroxide
2HNO3Liquid + Zn(OH)2Crystalline solidprecipitated
Zn(NO3)2Crystalline solid + 2H2OLiquid
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
−65.0
per 1 mol of
−32.5
per 1 mol of
−65.0
per 1 mol of
−65.0
per 1 mol of
−32.5

Changes in aqueous solution (1)

Reaction of nitric acid and zinc hydroxide
ΔrG−98.60 kJ/mol
K1.88 × 1017
pK−17.27
2HNO3Ionized aqueous solution + Zn(OH)2Un-ionized aqueous solution
Zn(NO3)2Ionized aqueous solution + 2H2OLiquid
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
−98.60
per 1 mol of
−49.30
per 1 mol of
−98.60
per 1 mol of
−98.60
per 1 mol of
−49.30

Changes in aqueous solution (2)

Reaction of nitric acid and zinc hydroxide
ΔrG−67.52 kJ/mol
K6.75 × 1011
pK−11.83
2HNO3Ionized aqueous solution + Zn(OH)2Crystalline solidγ
Zn(NO3)2Ionized aqueous solution + 2H2OLiquid
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
−67.52
per 1 mol of
−33.76
per 1 mol of
−67.52
per 1 mol of
−67.52
per 1 mol of
−33.76

Changes in aqueous solution (3)

Reaction of nitric acid and zinc hydroxide
ΔrG−67.81 kJ/mol
K7.58 × 1011
pK−11.88
2HNO3Ionized aqueous solution + Zn(OH)2Crystalline solidβ
Zn(NO3)2Ionized aqueous solution + 2H2OLiquid
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
−83.64−67.81−53.5
per 1 mol of
−41.82−33.91−26.8
per 1 mol of
−83.64−67.81−53.5
per 1 mol of
−83.64−67.81−53.5
per 1 mol of
−41.82−33.91−26.8

Changes in aqueous solution (4)

Reaction of nitric acid and zinc hydroxide
ΔrG−66.26 kJ/mol
K4.06 × 1011
pK−11.61
2HNO3Ionized aqueous solution + Zn(OH)2Crystalline solidε
Zn(NO3)2Ionized aqueous solution + 2H2OLiquid
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
−82.30−66.26−53.9125
per 1 mol of
−41.15−33.13−26.962.5
per 1 mol of
−82.30−66.26−53.9125
per 1 mol of
−82.30−66.26−53.9125
per 1 mol of
−41.15−33.13−26.962.5

Changes in aqueous solution (5)

Reaction of nitric acid and zinc hydroxide
2HNO3Ionized aqueous solution + Zn(OH)2Crystalline solidprecipitated
Zn(NO3)2Ionized aqueous solution + 2H2OLiquid
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
−83.3
per 1 mol of
−41.6
per 1 mol of
−83.3
per 1 mol of
−83.3
per 1 mol of
−41.6

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
HNO3 (l)-174.10[1]-80.71[1]155.60[1]109.87[1]
HNO3 (g)-135.06[1]-74.72[1]266.38[1]53.35[1]
HNO3 (ai)-207.36[1]-111.25[1]146.4[1]-86.6[1]
HNO3 (l)
1 hydrate
-473.46[1]-328.77[1]216.90[1]182.46[1]
HNO3 (l)
3 hydrate
-1056.04[1]-811.09[1]346.98[1]325.14[1]
Zn(OH)2 (cr)
γ
-553.81[1]
Zn(OH)2 (cr)
β
-641.91[1]-553.52[1]81.2[1]
Zn(OH)2 (cr)
ε
-643.25[1]-555.07[1]81.6[1]72.4[1]
Zn(OH)2 (cr)
precipitated
-642.2[1]
Zn(OH)2 (ai)-613.88[1]-461.56[1]-133.5[1]-251[1]
Zn(OH)2 (ao)-522.73[1]
* (l):Liquid, (g):Gas, (ai):Ionized aqueous solution, (cr):Crystalline solid, (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
Zn(NO3)2 (cr)-483.7[1]
Zn(NO3)2 (ai)-568.61[1]-369.57[1]180.7[1]-126[1]
Zn(NO3)2 (cr)
1 hydrate
-805.0[1]
Zn(NO3)2 (cr)
2 hydrate
-1110.27[1]
Zn(NO3)2 (cr)
4 hydrate
-1699.12[1]
Zn(NO3)2 (cr)
6 hydrate
-2306.64[1]-1772.71[1]456.9[1]323.0[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]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (l):Liquid, (g):Gas

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)