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4CsI + 9H2O2 + 4H+ → 4Cs+ + 3HIO3 + 9H2O + HI↑

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Reaction of caesium iodide and hydrogen peroxide under acidic condition
4CsICaesium iodide + 9H2O2Hydrogen peroxide + 4H+Hydrogen ion
⟶
4Cs+Caesium ion + 3HIO3Iodic acid + 9H2OWater + HI↑Hydrogen iodide

The reaction of caesium iodide, hydrogen peroxide, and hydrogen ion yields caesium ion, iodic acid, water, and hydrogen iodide (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 caesium iodide and hydrogen peroxide under acidic condition
4CsICaesium iodide + 9H2O2Hydrogen peroxide + 4H+Hydrogen ion
⟶
4Cs+Caesium ion + 3HIO3Iodic acid + 9H2OWater + HI↑Hydrogen iodide

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 caesium iodide and hydrogen peroxide under acidic condition

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
CsICaesium iodide4
Reducing
Oxidizable
H2O2Hydrogen peroxide9
Oxidizing
Oxidizing under acidic condition
H+Hydrogen ion4
–
Hydrogen ion

Products

Chemical formulaNameCoefficientTypeType in general
equation
Cs+Caesium ion4
–
–
HIO3Iodic acid3
Redoxed product
–
H2OWater9
Reduced
Water
HIHydrogen iodide1
–
–

Thermodynamic changes

Changes in standard condition (1)

Reaction of caesium iodide and hydrogen peroxide under acidic condition
◆
ΔrG−1117.7 kJ/mol
K6.49 × 10195
pK−195.81
4CsIIonized aqueous solution + 9H2O2Un-ionized aqueous solution + 4H+Un-ionized aqueous solution
⟶
4Cs+Un-ionized aqueous solution + 3HIO3Un-ionized aqueous solution + 9H2OLiquid + HI↑Gas
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
−1238.6−1117.7−403.6–
per 1 mol of
−309.65−279.43−100.9–
per 1 mol of
−137.62−124.19−44.84–
per 1 mol of
Hydrogen ion
−309.65−279.43−100.9–
per 1 mol of
Caesium ion
−309.65−279.43−100.9–
per 1 mol of
−412.87−372.57−134.5–
per 1 mol of
−137.62−124.19−44.84–
per 1 mol of
−1238.6−1117.7−403.6–

Changes in standard condition (2)

Reaction of caesium iodide and hydrogen peroxide under acidic condition
◆
ΔrG−1171.0 kJ/mol
K1.41 × 10205
pK−205.15
4CsIIonized aqueous solution + 9H2O2Un-ionized aqueous solution + 4H+Un-ionized aqueous solution
⟶
4Cs+Un-ionized aqueous solution + 3HIO3Un-ionized aqueous solution + 9H2OLiquid + HI↑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
−1320.3−1171.0−498.9–
per 1 mol of
−330.07−292.75−124.7–
per 1 mol of
−146.70−130.11−55.43–
per 1 mol of
Hydrogen ion
−330.07−292.75−124.7–
per 1 mol of
Caesium ion
−330.07−292.75−124.7–
per 1 mol of
−440.10−390.33−166.3–
per 1 mol of
−146.70−130.11−55.43–
per 1 mol of
−1320.3−1171.0−498.9–

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
CsI (cr)-346.60[1]-340.58[1]123.05[1]52.80[1]
CsI (g)-151.9[1]-191.2[1]275.29[1]37.45[1]
CsI (ai)-313.47[1]-343.59[1]244.3[1]-152.7[1]
H2O2 (l)-187.78[1]-120.35[1]109.6[1]89.1[1]
H2O2 (g)-136.31[1]-105.57[1]232.7[1]43.1[1]
H2O2 (ao)-191.17[1]-134.03[1]143.9[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
Cs+ (g)457.964[1]–––
Cs+ (ao)-258.28[1]-292.02[1]133.05[1]-10.5[1]
HIO3 (cr)-230.1[1]–––
HIO3 (ao)-211.3[1]-132.6[1]166.9[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]
HI (g)26.48[1]1.70[1]206.594[1]29.158[1]
HI (ai)-55.19[1]-51.57[1]111.3[1]-142.3[1]
* (g):Gas, (ao):Un-ionized aqueous solution, (cr):Crystalline solid, (l):Liquid, (ai):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)