fecl3 + hi

Ferric chloride(FeCl3) exhibits +3 oxidation state. HI is a strong acid that gets ionized completely in an aqueous solution. Let us see the reaction of HI+ FeCl3 in detail.

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FeCl3 appears lớn be a green-black color in reflector light, yellow solid in hexahydrate, and brown in solution. It is an anhydrous compound in crystalline solid khuông and is a Lewis acid. HI is a colorless liquid with acrid order. HI acts as a co-catalyst in the production of Acetic acid.

This article will discuss some important reactions between HI and FeCl3, lượt thích redox reaction, reversible reaction, product formed etc.

What is the product of HI and FeCl3?

Ferrous chloride(FeCl2), hydrochloric acid(HCl) and Iodine(I2) are formed when ferric chloride(FeCl3) reacts with iodane(HI).

FeCl3 + HI —> HCl+ FeCl2 + I2.

What type of reaction are HI and FeCl3?

The reaction between HI and FeCl3 is an oxidation-reduction reaction.

How lớn balance HI and FeCl3?

The reaction between HI and FeCl3 is balanced, as shown below:

  • The general equation is FeCl3 + HI —>HCl + FeCl2+ I2
  • The number of moles in the reactants and products side is shown in the table below.
Table representing the number of moles of reactants and products
  • The number of moles of I is lớn be multiplied by 2 on the reactant side lớn balance it.
  • Also, the number of moles of H has lớn be multiplied by 2 on the product side.
  • The number of moles of Cl is unbalanced, ví lớn balance it, multiply it by 3 on the product side and by 2 on the reactant side.
  • Hence, the number of moles of  Fe is also balanced.
  • The balanced equation is,
    2 FeCl3 + 2HI —>2HCl + 2FeCl2 + I2.

HI + FeCl3 net ionic equation.

  • The ionic equation is 2Fe3+(aq)  +2I (aq)  —> 2Fe2+ (aq) + 2I(g).
  • The state of elements in the ionic equation of the HI + fecl3 reaction is as follows
  • 2 HI  (aq) +2 FeCl3 (aq) —>2 FeCl2 (aq) + 2HCl (aq) +I2(g).
  • The ionic equation of each element is as follows:
    2H+(aq)+ 2I(aq)+2Fe3+(aq)+6Cl(aq)  —> 2Fe2+(aq) + 4Cl(aq) + 2H+ (aq) + 2Cl (aq)+ 2I(g).
  • The same ions from either side gets canceled. Therefore,
    2Fe3+(aq)  +2I (aq)  —> 2Fe2+ (aq) + 2I(g).

Is HI + FeCl3 a conjugate pair?

HI + FeCl3 bởi not have conjugate pair because they bởi not have a difference in their proton number lớn khuông a conjugate pair.

HI + FeCl3 intermolecular forces

  • The intermolecular forces exhibited by HI are London – dispersion force and dipole-dipole force.
  • The intermolecular force in the FeCl3 molecule is electrostatic attraction.
  • Dipole-dipole interaction is observed in HCl.

HI + FeCl3 reaction enthalpy

The reaction enthalpy of HI + FeCl3 is 1.31 KJ/mol. The standard enthalpy  of the formation of reactants and products is shown below:

MoleculesReaction enthalpy(KJ/mol)
Table showing the standard enthalpy of formation of molecules.

The reaction enthalpy is calculated as follows:

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  • Reaction enthalpy = (standard enthalpy of products)- (standard enthalpy of reactants)      

Is HI+ FeCl3 a buffer solution?

HI+ FeCl3 is not a buffer solution as HI is a strong acid, and it does not khuông a weak acid instead khuông another strong acid HCl, as a  product.

Is HI+ FeCl3 a complete reaction?

 HI + FeCl3 is a complete reaction because no more reaction occurs after the products are formed.

Is HI+ FeCl3 an exothermic or endothermic reaction?

HI + FeCl3 is an endothermic reaction as the reaction enthalpy value is positive.

Graph showing endothermic reaction

Is HI+ FeCl3 a Redox reaction?

HI + FeCl3 is a redox reaction due lớn the following reason:

  • 2I – 2e—> 2I ; is the Oxidation reaction and;
  • 2Fe 3+ +2 e —> 2Fe; is the reduction reaction.
  • HI is a reducing agent in this reaction, and FeCl3 is an oxidizing agent.

Is HI+ FeCl3 a reversible reaction?

HI+ FeCl3 is not a reversible reaction as the product cannot be changed lớn reactants by any method.

Is HI+ FeCl3 a displacement reaction?

HI+ FeCl3 is a single displacement reaction in which the cl atom gets displaced from FeCl3 lớn khuông HCl.


HI ionizes completely in water and is used in the cativa process. FeCl3 is used for catalyzing many reactions, lượt thích the preparation of aromatic compounds. It is also used as a leaching agent in Metallurgy and sewage water treatment. HCl is an important laboratory reagent.

Read more facts on HI

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HI + Fe2(SO4)3
HI + Fe(OH)3
HI + CaO
HI + Mn(OH)2
HI + Fe3O4
HI + ZnO
HI + KClO3
HI + FeCl3
HI + K2SO4
HI + MgCO3
HI + K2Cr2O7
HI + K2S
HI + Ba(OH)2
HI + Fe2O3
HI + KMnO4
HI + Cl2
HI + Ca(OH)2
HI + CaOCl2
HI + Sr(OH)2
HI + MnO2
HI + SO2
HI + MgSO3
HI + Na2S
HI + CuSO4
HI + NaNO2
HI + H2O2