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Fe₂(CO₃)₃ (Ferric carbonate) is a base while HCl exists both as gas or strong acid. Let us discuss the reaction between Fe₂(CO₃)₃ + HCl in detail in this article.

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Fe₂(CO₃)₃ is an inorganic compound. It is a base. HCl can exists as both gas and acid. It is also known as muriatic acid. It is colourless. HCl is formed by reaction between H₂ and Cl₂.

Let us explore in this article, the products formed in the reaction HCl + Fe₂(CO₃)₃, balancing the reaction, type of reaction, titration, net ionic reaction etc.

What is the product of HCl and Fe₂(CO₃)₃?

The product of the HCl + Fe₂(CO₃)₃ reaction are ferric trichloride (FeCl₃), water (H₂O) and carbon dioxide.

6HCl + Fe₂(CO₃)₃ –> 3H₂O + 2FeCl₃ + 3CO₂

What type of reaction is HCl + Fe₂(CO₃)₃?

• HCl and Fe₂(CO₃)₃ is a neutralization (acid-base) reaction because acid (HCl) and base Fe₂(CO₃)₃ react lớn size salt and water.
• HCl and Fe₂(CO₃)₃ is also a double-displacement reaction. The double-displacement reaction is followed by a decomposition reaction.

6HCl + Fe₂(CO₃)₃ –> 2FeCl₃ + 3H₂CO₃

3H₂CO₃ –> 3CO₂ + 3H₂O

How lớn balance HCl + Fe₂(CO₃)₃?

We will balance the equation HCl + Fe₂(CO₃)₃ using algebraic equation.

• Write the skeletal chemical Equation.

     HCl + Fe₂(CO₃)₃ –> H₂O + Fe₂Cl₃ + CO₂

• Count the number of each element on the reactant and the product side.

• Count the number of each type of element on the reactant side and product side.
• Add the appropriate stoichiometric coefficient before the substituents lớn balance elements. Add a coefficient of 3 before H₂O and CO₂. Add a coefficient of 6 before HCl and 2 before FeCl₃.
• The balanced chemical equation is as follows –

         6HCl + Fe₂(CO₃)₃ –> 3H₂O + 2FeCl₃ + 3CO₂

HCl + Fe₂(CO₃)₃ titration

The compound Fe₂(CO₃)₃ is an insoluble compound ví we need lớn perform back titration method. The procedure is given below.

Apparatus Needed:

Burette, Burette stand, volumetric flask, pipette, conical flask, Beakers

Chemicals Needed

Fe₂(CO₃)₃, HCl, NaOH, phenolphthalein indicator

Procedure:

• Take measured amount of Fe₂(CO₃)₃. Add HCl lớn it and make a homogenous solution. Transfer the solution lớn a volumetric flask. Add distilled water lớn make the solution up lớn the mark.
• Take 15 ml of this solution in a conical flask with the help of a pipette and add lớn it 2-3 drops of indicator.
• Take standard NaOH solution in a burette. Titrate the solution against the standard NaOH solution.
• Concentration of Fe₂(CO₃)₃ can be calculated from the concordant readings.

HCl + Fe₂(CO₃)₃ net ionic equation

The complete ionic equation for HCl + Fe₂(CO₃)₃ reaction is as below-

Complete ionic equation

6H⁺_(aq) + 6Cl^–_(aq) + Fe₂(CO₃)_3(s) –>3H₂O_(l) + 2Fe³⁺_(aq) + 6Cl^–_(aq) + 3CO₂

Net ionic Equation after cancelling the spectator ions on both sides is as below-

Net ionic equation

Fe₂(CO₃)_3(s) + 6H⁺_(aq)  –> 3H₂O_(l) + 2Fe³⁺_(aq) + 3CO₂

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HCl and Fe₂(CO₃)₃ conjugate pairs

HCl + Fe₂(CO₃)₃ size conjugate acid-base pairs.

• HCl donates a proton and forms Cl^– as its conjugate base. Thus the conjugate base of HCl is Cl^– .
• Carbonate ion (CO₃^2-) accepts a proton and forms a conjugate acid HCO₃^– .

HCl and Fe₂(CO₃)₃ intermolecular forces

The intermolecular forces present in HCl + Fe₂(CO₃)₃ are as follows –

• The intermolecular forces present in HCl are London dispersion forces and dipole-dipole interactions.
• The intermolecular force in Fe₂(CO₃)₃ is electrostatic force of attraction as Fe₂(CO₃)₃ is an ionic compound.

HCl and Fe₂(CO₃)₃ reaction enthalpy

The reaction enthalpy for HCl + Fe₂(CO₃)₃ is -351.64 kJ/mol.

6HCl + Fe₂(CO₃)₃ –>3H₂O + 2FeCl₃ + 3CO₂            

∆H_f^ο_(reaction)= ∑H_f^ο_(product) – ∑H_f^ο_(reactant)

∆H_f^ο_(reaction) = -2836.9 + 2485.26 = -351.64 kJ/mol

Is HCl + Fe₂(CO₃)₃ a buffer solution?

HCl + Fe₂(CO₃)₃ is not a buffer solution because HCl + Fe₂(CO₃)₃ is not formed by a weak acid and its conjugate base or a weak base and its conjugate acid.

Is HCl + Fe₂(CO₃)₃ a complete reaction?

HCl + Fe₂(CO₃)₃ is a complete reaction because energy of the products is less kêu ca the reactants ví are stable. They tự not react further lớn give more products.

Is HCl + Fe₂(CO₃)₃ an exothermic or endothermic reaction?

HCl + Fe₂(CO₃)₃ is an exothermic reaction because the standard enthalpy of the reaction

is -351.64 kJ/mol. Negative sign indicates exothermic reaction.

Is HCl + Fe₂(CO₃)₃ a redox reaction?

HCl + Fe₂(CO₃)₃ is not a redox reaction because the oxidation states of the elements on the reactant and product side is the same.

Is HCl + Fe₂(CO₃)₃ a precipitation reaction?

HCl + Fe₂(CO₃)₃ is not a precipitation reaction because the product, ferric chloride formed in the reaction is soluble in water.

Is HCl + Fe₂(CO₃)₃ reversible or irreversible reaction?

The reaction Fe₂(CO₃)₃ + HCl is irreversible because CO₂ gas formed in the reaction increases the entropy of the reaction. Also, the reactants formed in the reaction tự not react back lớn give the reactants again.

Is HCl + Fe₂(CO₃)₃ displacement reaction?

HCl + Fe₂(CO₃)₃ is a double displacement reaction because in this reaction ions are exchanged between the reacting species.

6HCl + Fe₂(CO₃)₃ –> 2FeCl₃ + 3H₂CO₃

Conclusion:

HCl + Fe₂(CO₃)₃ is a neutralization reaction. It is also a double displacement reaction. HCl + Fe₂(CO₃)₃ is an exothermic reaction. The enthalpy of the reaction is -351.64 kJ/mol.

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