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  3. 4RbI + 3HNO3 + 3H^+ → RbNO3 + 3Rb^+ + 2I2 + 2HNO2 + 2H2O

4RbI + 3HNO3 + 3H+ → RbNO3 + 3Rb+ + 2I2 + 2HNO2 + 2H2O

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Reaction of rubidium iodide and nitric acid under acidic condition
4RbIRubidium iodide + 3HNO3Nitric acid + 3H+Hydrogen ion
⟶
RbNO3Rubidium nitrate + 3Rb+Rubidium ion + 2I2Iodine + 2HNO2Nitrous acid + 2H2OWater

The reaction of rubidium iodide, nitric acid, and hydrogen ion yields rubidium nitrate, rubidium ion, iodine, nitrous acid, and water (Other reactions are here). This reaction is an oxidation-reduction 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

Reaction of rubidium iodide and nitric acid under acidic condition
4RbIRubidium iodide + 3HNO3Nitric acid + 3H+Hydrogen ion
⟶
RbNO3Rubidium nitrate + 3Rb+Rubidium ion + 2I2Iodine + 2HNO2Nitrous acid + 2H2OWater

General equation

Reaction of oxidizable species and oxidizing species under acidic condition
Oxidizable speciesReducing agent + Oxidizing speciesOxidizing agent + H+Non-redox agent
⟶
ProductOxidation product + ProductReduction product + H2ONon-redox product

Oxidation state of each atom

Reaction of rubidium iodide and nitric acid under acidic condition

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
RbIRubidium iodide4
Reducing
Oxidizable
HNO3Nitric acid3
Oxidizing
Oxidizing under acidic condition
H+Hydrogen ion3
–
Hydrogen ion

Products

Chemical formulaNameCoefficientTypeType in general
equation
RbNO3Rubidium nitrate1
–
–
Rb+Rubidium ion3
–
–
I2Iodine2
Oxidized
–
HNO2Nitrous acid2
Reduced
–
H2OWater2
–
Water

Thermodynamic changes

Changes in standard condition

Reaction of rubidium iodide and nitric acid under acidic condition
◆
ΔrG−113.8 kJ/mol
K8.65 × 1019
pK−19.94
4RbIIonized aqueous solution + 3HNO3Ionized aqueous solution + 3H+Un-ionized aqueous solution
⟶
RbNO3Ionized aqueous solution + 3Rb+Un-ionized aqueous solution + 2I2Un-ionized aqueous solution + 2HNO2Un-ionized 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
−129.4−113.8−51.9–
per 1 mol of
−32.35−28.45−13.0–
per 1 mol of
−43.13−37.93−17.3–
per 1 mol of
Hydrogen ion
−43.13−37.93−17.3–
per 1 mol of
−129.4−113.8−51.9–
per 1 mol of
Rubidium ion
−43.13−37.93−17.3–
per 1 mol of
−64.70−56.90−25.9–
per 1 mol of
−64.70−56.90−25.9–
per 1 mol of
−64.70−56.90−25.9–

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
RbI (cr)-333.80[1]-328.86[1]118.41[1]53.18[1]
RbI (g)-134.3[1]-174.1[1]268.81[1]37.36[1]
RbI (ai)-306.35[1]-335.56[1]232.6[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]
H+ (g)1536.202[1]–––
H+ (ao)0[1]0[1]0[1]0[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (l):Liquid, (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
RbNO3 (cr)-495.05[1]-395.78[1]147.3[1]102.1[1]
RbNO3 (ai)-458.52[1]-395.24[1]267.8[1]–
Rb+ (g)490.101[1]–––
Rb+ (ao)-251.17[1]-283.98[1]121.50[1]–
I2 (cr)0[1]0[1]116.135[1]54.438[1]
I2 (g)62.438[1]19.327[1]260.69[1]36.90[1]
I2 (ao)22.6[1]16.40[1]137.2[1]–
HNO2 (g)
cis
-77.99[1]-42.94[1]248.76[1]44.77[1]
HNO2 (g)
trans
-80.12[1]-45.24[1]249.22[1]46.07[1]
HNO2 (g)-79.5[1]-46.0[1]254.1[1]45.6[1]
HNO2 (ao)-119.2[1]-50.6[1]135.6[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]
* (cr):Crystalline solid, (ai):Ionized aqueous solution, (g):Gas, (ao):Un-ionized aqueous solution, (l):Liquid

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)