15 Facts on HBr + Fe3O4: What, How To Balance & FAQs

Fe₃O₄ is a naturally occurring mineral known as hematite. It has magnetic properties. Let us read how it reacts with HBr in this article.

Hydrogen bromide is a colourless gas that produces hydrobromide acid when dissolved in water. Iron (II,III) oxide is sometimes formulated as FeO.Fe₂O₃. It exhibits permanent magnetism and has ferrimagnetic properties.

We will discuss useful facts about the HBr+ Fe₃O₄ reaction, like redox reaction, type of reaction, products and balanced chemical equation.

What is the product of HBr and Fe₃O₄

Ferric bromide (FeBr₃) and Ferrous bromide (FeBr₂) are the products of the HBr and Fe₃O₄ reaction. The chemical equation for the reaction is,

HBr + Fe₃O₄ = FeBr₂ + FeBr₃ + H₂O

What type of reaction is HBr + Fe₃O₄

HBr + Fe₃O₄ reaction is a double displacement reaction.

How to balance HBr + Fe₃O₄

The balanced chemical equation for HBr + Fe₃O₄ reaction is,

8HBr + Fe₃O₄ = FeBr₂ + 2FeBr₃ + 4H₂O

• The unbalanced chemical equation for the reaction is

• HBr + Fe₃O₄ = FeBr₂ + FeBr₃ + H₂O

• To check whether the number of atoms on both sides of the equation is equal or unequal.

• All the atoms are unbalanced; therefore, we multiply a coefficient of 8, 2, and 4 with HBr, FeBr₃ and H₂O respectively in order to balance them.

• Thus, the balanced chemical equation for the reaction is,

• 8HBr + Fe₃O₄ = FeBr₂ + 2FeBr₃ + 4H₂O

HBr + Fe₃O₄ titration

Titration between HBr and Fe₃O₄ is not possible as it is not completely defined that Fe₃O₄ shows a basic or acidic character. Therefore, a suitable indicator cannot be picked for this titration.

HBr + Fe₃O₄ net ionic equation

HBr + Fe₃O₄ net ionic equation is,

8H⁺ (aq.) + 8Br^– (aq.) + Fe₂O₃ (s) = FeBr₂ (s) + 2Fe³⁺ (aq.) + 6Br^– (aq.) + 4H₂O (l)

• Write the general balanced chemical equation.

• 8HBr + Fe₃O₄ = FeBr₂ + 2FeBr₃ + 4H₂O

• Indicate the chemical state (s, l, g or aq) in the equation.

• 8HBr (aq.) + Fe₃O₄ (s) = FeBr₂ (s) + 2FeBr₃ (aq.) + 4H₂O (l)

• Split the strong electrolytes into their corresponding ions in an aqueous solution.

• 8H⁺ (aq.) + 8Br^– (aq.) + Fe₂O₃ (s) = FeBr₂ (s) + 2Fe³⁺ (aq.) + 6Br^– (aq.) + 4H₂O (l)

• Delete the spectator ions to obtain the net ionic equation.

• 8H⁺ (aq.) + 2Br^– (aq.) + Fe₂O₃ (s) = FeBr₂ (s) + 2Fe³⁺ (aq.) + 4H₂O (l)

HBr + Fe₃O₄ conjugate pairs

HBr + Fe₃O₄ reaction has the following conjugate pairs,

• The conjugate pair of H₂O contains H₂O and its conjugate base OH^–.

• HBr, Fe₃O₄ and Iron bromides do not have any conjugate pairs.

HBr and Fe₃O₄ intermolecular forces

HBr + Fe₃O₄ reaction has the following intermolecular forces,

• The intermolecular force between HBr is dipole-dipole forces.

• The H₂O molecule contains dipole-dipole and London dispersion forces between its molecules.

HBr + Fe₃O₄ reaction enthalpy

HBr + Fe₃O₄ reaction enthalpy is -522.9 kJ/mol. The standard enthalpy of formation of reactants and products is as follows:

Molecules	Reaction enthalpy (in kJ/mol)
HBr	-36.23
Fe3O4	-1118.4
FeBr2	-249.8
FeBr3	-269
H2O	-285.83

ΔH_f = Enthalpy of formation (product) – enthalpy of formation (reactant)

ΔH_f =[-249.8 – 2*(-269) – 285.83) – (-36.23 – 1118.4)

ΔH_f = -522.9 kJ/mol.

Is HBr + Fe₃O₄ a buffer solution

HBr + Fe₃O₄ reaction is not a buffer solution because HBr is a strong acid, but there must be a weak acid available to prepare a buffer solution.

Is HBr + Fe₃O₄ a complete reaction

HBr + Fe₃O₄ reaction is a complete reaction and no more steps are left to proceed further.

Is HBr + Fe₃O₄ an exothermic or endothermic reaction

HBr + Fe₃O₄ reaction is an exothermic reaction and heat is released during the reaction.

Is HBr + Fe₃O₄ a redox reaction

HBr + Fe₃O₄ reaction is not a redox reaction as the oxidation states of atoms remained unchanged during the process.

Is HBr + Fe₃O₄ a precipitation reaction

HBr + Fe₃O₄ reaction is not a precipitation reaction because no solid products are obtained after the reaction is complete.

Is HBr + Fe₃O₄ reversible or irreversible reaction

HBr + Fe₃O₄ is an irreversible reaction and cannot be made to obtain the reactants back under normal temperature and pressure conditions.

Is HBr + Fe₃O₄ displacement reaction

HBr + Fe₃O₄ is a double displacement reaction followed by a dissociation reaction. H₂ and Fe displace each other from their respective compounds so as to produce new products.

Conclusion

This article concludes that HBr is initially obtained as a gas and then made to dissolve into water to obtain the aqueous solution. Fe₂O₄ is a magnetite means have magnetic properties. It is prepared in the laboratory according to the need of size and shape from an industrial point of view.