You-iggy
  1. Home
  2. Chemical reactions
  3. 4NaCl + 2KBrO3 + 4H^+ ๐Ÿ”ฅโ†’ 4Na^+ + 2ClO2โ†‘ + Br2 + 2KCl + 2H2O

4NaCl + 2KBrO3 + 4H+ ๐Ÿ”ฅโ†’ 4Na+ + 2ClO2โ†‘ + Br2 + 2KCl + 2H2O

Last updated:
Reaction of sodium chloride and potassium bromate under acidic condition
4NaClSodium chloride + 2KBrO3Potassium bromate + 4H+Hydrogen ion
๐Ÿ”ฅ
โŸถ
4Na+Sodium ion + 2ClO2โ†‘Chlorine dioxide + Br2Bromine + 2KClPotassium chloride + 2H2OWater

The reaction of sodium chloride, potassium bromate, and hydrogen ion yields sodium ion, chlorine dioxide, bromine, potassium chloride, 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 sodium chloride and potassium bromate under acidic condition
4NaClSodium chloride + 2KBrO3Potassium bromate + 4H+Hydrogen ion
๐Ÿ”ฅ
โŸถ
4Na+Sodium ion + 2ClO2โ†‘Chlorine dioxide + Br2Bromine + 2KClPotassium chloride + 2H2OWater

General equation

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

Oxidation state of each atom

Reaction of sodium chloride and potassium bromate under acidic condition

Reactants

Chemical formulaNameCoefficientTypeType in general
equation
NaClSodium chloride4
Reducing
Hardly oxidizable
KBrO3Potassium bromate2
Oxidizing
Oxidizing under acidic condition
H+Hydrogen ion4
โ€“
Hydrogen ion

Products

Chemical formulaNameCoefficientTypeType in general
equation
Na+Sodium ion4
โ€“
โ€“
ClO2Chlorine dioxide2
Oxidized
โ€“
Br2Bromine1
Reduced
โ€“
KClPotassium chloride2
โ€“
โ€“
H2OWater2
โ€“
Water

Thermodynamic changes

Changes in standard condition (1)

Reaction of sodium chloride and potassium bromate under acidic condition
โ—†
ฮ”rGโˆ’4.1 kJ/mol
K5.23 ร— 100
pKโˆ’0.72
4NaClIonized aqueous solution + 2KBrO3Ionized aqueous solution + 4H+Un-ionized aqueous solution
๐Ÿ”ฅ
โŸถ
4Na+Un-ionized aqueous solution + 2ClO2โ†‘Gas + Br2Un-ionized aqueous solution + 2KClIonized aqueous solution + 2H2OLiquid
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
99.2โˆ’4.1347.6โ€“
per 1 mol of
24.8โˆ’1.086.90โ€“
per 1 mol of
49.6โˆ’2.0173.8โ€“
per 1 mol of
Hydrogen ion
24.8โˆ’1.086.90โ€“
per 1 mol of
Sodium ion
24.8โˆ’1.086.90โ€“
per 1 mol of
49.6โˆ’2.0173.8โ€“
per 1 mol of
99.2โˆ’4.1347.6โ€“
per 1 mol of
49.6โˆ’2.0173.8โ€“
per 1 mol of
49.6โˆ’2.0173.8โ€“

Changes in standard condition (2)

Reaction of sodium chloride and potassium bromate under acidic condition
โ—†
ฮ”rGโˆ’4.9 kJ/mol
K7.22 ร— 100
pKโˆ’0.86
4NaClIonized aqueous solution + 2KBrO3Ionized aqueous solution + 4H+Un-ionized aqueous solution
๐Ÿ”ฅ
โŸถ
4Na+Un-ionized aqueous solution + 2ClO2โ†‘Un-ionized aqueous solution + Br2Un-ionized aqueous solution + 2KClIonized aqueous solution + 2H2OLiquid
Standard enthalpy
of reaction
ฮ”rHยฐ
kJ ยท molโˆ’1		Standard
Gibbs energy
of reaction
ฮ”rGยฐ
kJ ยท molโˆ’1		Standard entropy
of reaction
ฮ”rSยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard heat
capacity of reaction
at constant pressure
ฮ”rCpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
per 1 mol of
Equation
44.0โˆ’4.9163.5โ€“
per 1 mol of
11.0โˆ’1.240.88โ€“
per 1 mol of
22.0โˆ’2.581.75โ€“
per 1 mol of
Hydrogen ion
11.0โˆ’1.240.88โ€“
per 1 mol of
Sodium ion
11.0โˆ’1.240.88โ€“
per 1 mol of
22.0โˆ’2.581.75โ€“
per 1 mol of
44.0โˆ’4.9163.5โ€“
per 1 mol of
22.0โˆ’2.581.75โ€“
per 1 mol of
22.0โˆ’2.581.75โ€“

Thermodynamic data of reactants

Chemical formulaStandard enthalpy
of formation
ฮ”fHยฐ
kJ ยท molโˆ’1		Standard Gibbs
energy of
formation
ฮ”fGยฐ
kJ ยท molโˆ’1		Standard
molar entropy
Sยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard molar
heat capacity at
constant pressure
Cpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
NaCl (cr)-411.153[1]-384.138[1]72.13[1]50.50[1]
NaCl (g)-176.65[1]-196.66[1]229.81[1]35.77[1]
NaCl (ai)-407.27[1]-393.133[1]115.5[1]-90.0[1]
KBrO3 (cr)-360.24[1]-271.16[1]149.16[1]105.19[1]
KBrO3 (ai)-319.45[1]-264.67[1]264.22[1]โ€“
H+ (g)1536.202[1]โ€“โ€“โ€“
H+ (ao)0[1]0[1]0[1]0[1]
* (cr):Crystalline solid, (g):Gas, (ai):Ionized aqueous solution, (ao):Un-ionized aqueous solution

Thermodynamic data of products

Chemical formulaStandard enthalpy
of formation
ฮ”fHยฐ
kJ ยท molโˆ’1		Standard Gibbs
energy of
formation
ฮ”fGยฐ
kJ ยท molโˆ’1		Standard
molar entropy
Sยฐ
J ยท Kโˆ’1 ยท molโˆ’1		Standard molar
heat capacity at
constant pressure
Cpยฐ
J ยท Kโˆ’1 ยท molโˆ’1
Na+ (g)609.358[1]โ€“โ€“โ€“
Na+ (ao)-240.12[1]-261.905[1]59.0[1]46.4[1]
ClO2 (g)102.5[1]120.5[1]256.84[1]41.97[1]
ClO2 (ao)74.9[1]120.1[1]164.8[1]โ€“
Br2 (cr)โ€“โ€“โ€“โ€“
Br2 (l)0[1]0[1]152.231[1]75.689[1]
Br2 (g)30.907[1]3.110[1]245.463[1]36.02[1]
Br2 (ao)-2.59[1]3.93[1]130.5[1]โ€“
KCl (cr)-436.747[1]-409.14[1]82.59[1]51.30[1]
KCl (g)-214.14[1]-233.0[1]239.10[1]36.48[1]
KCl (ai)-419.53[1]-414.49[1]159.0[1]-114.6[1]
H2O (cr)โ€“โ€“โ€“โ€“
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]
* (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)