13 Facts on HI +FeCl3: What, How To Balance & FAQs

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.

FeCl₃ appears to be a green-black color in reflector light, yellow solid in hexahydrate, and brown in solution. It is an anhydrous compound in crystalline solid form 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, like 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 to 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.

• The number of moles of I is to be multiplied by 2 on the reactant side to balance it.
• Also, the number of moles of H has to be multiplied by 2 on the product side.
• The number of moles of Cl is unbalanced, so to 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 FeCl_{3 (aq)} —>2 FeCl_{2 (aq)} + 2HCl _(aq) +I_2(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 do not have conjugate pair because they do not have a difference in their proton number to form 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:

The reaction enthalpy is calculated as follows:

• 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 form a weak acid instead form 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.

Is HI+ FeCl₃ a Redox reaction?

HI + FeCl₃ is a redox reaction due to 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 to 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 to form HCl.

Conclusion

HI ionizes completely in water and is used in the cativa process. FeCl₃ is used for catalyzing many reactions, like 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

Manjula Sivapuri

Hello…I am Manjula Sivapuri. I have completed my graduation in Chemistry. Currently working as a Chemistry Subject Matter expert in LambdaGeeks. My keen interest in chemistry has brought me to this platform to share my knowledge on the subject. I hope my work will make you understand the topics well.
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