fe304 hcl

Fe₃O­₄ is a mixed valence oxide of iron which have some basic property ví it can react with HCl. Let us see what happens when both are reacted.

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Fe₃O₄ iron is present in the +2 and +3 oxidation states due to lớn the +2 oxidation state which is the basic property and for this reason, it can react with HCl. The reaction does not require any kind of catalyst or other parameters lượt thích temperature and pressure.

Let us discuss the mechanism of the reaction between HCl and Fe₃O₄, the reaction enthalpy, the type of reaction, product formation, etc in the following part of the article.

1. What is the product of HCl and Fe₃O₄?

Ferric chloride and ferrous chloride are formed as major product along with water molecule when HCl and mixed Fe₃O₄ are subject to lớn reaction, due to lớn the different oxidation states of iron.

2. What type of reaction is HCl + Fe₃O₄?

The reaction between HCl and mixed valence oxide of iron is a redox reaction where chlorine atoms are oxidized and iron gets reduced. Also, it is one kind of acid-base reaction along with a precipitation reaction because the product is precipitated.

3. How to lớn balance HCl + Fe₃O₄?

HCl + Fe₃O₄ = FeCl₂ + FeCl₃ + H₂O this reaction is not balanced yet because the atoms are not equal for the left side and right side, ví we have to lớn balance the equation in the following way,

• Step 1 – We first labeled all the reactants and products by A, B, C, D, and E as coefficients because there are five molecules present.
• The reaction will look lượt thích this,
• A HCl + B Fe₃O₄ = C FeCl₂ + D FeCl₃ + E H₂O
• Step 2 –   Now we use the equation by the suitable number, the coefficient already labeled as alphabet reactants and products.
• Fe = 3B = C + D, Cl = A = 2C + 2 chiều, O = 4B = E, H = A = 2E
• Step 3 – Now using Gaussian elimination we calculate the value of each coefficient and variable,
• A = 8, B = 1, C = 1, D = 2, and E = 4
• So, the overall balanced equation for the above reaction is,
• Fe₃O₄ + 8HCl = FeCl₂ + 2FeCl₃ + 4H₂O

4. HCl + Fe₃O₄ titration

Fe₃O₄ can be titrated against HCl under a suitable indicator to lớn estimate the amount of iron in a given sample of Fe₃O₄, it can be done in some processes,

Apparatus used

A burette, conical flask, burette holder, volumetric flask, and beakers are required for titration.

Titre and titrant

Here HCl served as titrant which is taken in the burette and Fe3O4 will be the molecule to lớn be analyzed.

Indicator

The titration of HCl and Fe₃O₄ is done in acidic pH. Phenolphthalein is the perfect indicator which is pink in a basic medium and colorless in an acidic medium.

Procedure

The burette is filled with standardized HCl and Fe₃O₄ is taken in a conical flask and mixed with an indicator. Then titration is started by adding HCl from the burette in a conical flask dropwise. After some time when the endpoint is reached indicator shows a color change which indicates that the titration is completed.

We repeat the titration several times for better results and then we estimate the iron quantity by the formula V₁S₁ = V₂S₂.

5. HCl+ Fe₃O₄ net ionic equation

The net ionic equation for the HCl is proton along with chloride and for the product, ferrous and ferric chloride along with chloride, proton and hydroxide ions come from water.

H⁺ + Cl^– + Fe₃O₄ = Fe²⁺ + 2Cl^– + Fe³⁺ + 3Cl^– + H⁺ + OH^–

6. HCl+ Fe₃O₄ conjugate pairs

The conjugate pairs of the reaction HCl with Fe₃O₄ is the conjugate base of acid which is chloride ion and oxide is the protonic size of the molecule along with iron cation.

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• Conjugate pair of HCl = Cl^–
• Conjugate pair of Fe₃O₄ = HFe₃O₄⁺

7. HCl and Fe₃O₄ intermolecular forces

The intermolecular force present in HCl is the strong electrostatic force between proton and chloride ion due to lớn polarity. In the case of Fe₃O₄, there is only ionic interaction present along with covalent force as the molecule is non-polar.

8. HCl + Fe₃O₄ reaction enthalpy

The total reaction enthalpy for the reaction HCl and Fe₃O₄ is calculated by the formula, the enthalpy of the product – enthalpy of the reactants.

So, the total enthalpy change for the reaction is, +444 kJ/mol =[(-341.8)+2*(-399.5)+4*(-68)] – [(-1118.4)+8*(-92.3)] , which is positive value.

9. Is HCl + Fe₃O₄ a buffer solution?

The reaction between HCl and Fe₃O₄ does not give any buffer solution because Fe₃O₄ is not a basic salt.

10. Is HCl + Fe₃O₄ a complete reaction?

The reaction between HCl and Fe₃O₄ is about to lớn complete because it forms ferric chloride, ferrous chloride, and H₂O after the completion of the reaction.

Fe₃O₄ + 8HCl = FeCl₂ + 2FeCl₃ + 4H₂O

11. Is HCl + Fe₃O₄ an exothermic or endothermic reaction?

The reaction between Fe₃O₄ and HCl is endothermic as per thermodynamics because we get a positive enthalpy change for the reaction which denotes reaction absorbs the heat or the energy of the products is much lower phàn nàn the energy of reactants. Where δH is always positive.

12. Is HCl + Fe₃O₄ a redox reaction?

The reaction of HCl and Fe₃O₄ is a redox reaction where the chlorine atoms get reduced and iron gets oxidized due to lớn the mixed valence oxide and the oxygen atom gets oxidized here.

13. Is HCl + Fe₃O₄ a precipitation reaction

In the reaction between HCl and Fe₃O₄, one of the products formed is ferrous chloride which is precipitated in the solution and exists at the lower part of the conical flask.

14. Is HCl + Fe₃O₄ reversible or irreversible reaction?

The reaction between HCl and Fe₃O₄ is also irreversible as it can proceed only forward.

15. Is HCl + Fe­₃O₄ displacement reaction?

The above reaction between HCl and Fe₃O₄ is a double displacement reaction where chlorine from the acid part is displaced to lớn ferrous and ferric chloride molecules and iron is also displaced from its oxide to lớn produce salt and water.

Conclusion

We conclude that the reaction of HCl with Fe₃O₄ gives us two mixed valence chloride molecules where iron shows +2 and +3 oxidation states. Because Fe₃O₄ is a spinel complex in organometallic chemistry.

Read more about Facts on HCl + CaOCl2, Facts on HCl + Ag and Facts on HCl + AgCl.

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