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.
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 to form 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 to 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.
| Element | Element on the reactant side | Element on the product side |
|---|---|---|
| H | 1 | 2 |
| Cl | 1 | 3 |
| Fe | 2 | 1 |
| C | 3 | 1 |
| O | 9 | 3 |
- Count the number of each type of element on the reactant side and product side.
- Add the appropriate stoichiometric coefficient before the substituents to 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 so we need to 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 to it and make a homogenous solution. Transfer the solution to a volumetric flask. Add distilled water to make the solution up to the mark.
- Take 15 ml of this solution in a conical flask with the help of a pipette and add to 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
HCl and Fe2(CO3)3 conjugate pairs
HCl + Fe2(CO3)3 form 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 (CO32-) 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.
| Compounds | Reaction Enthalpy In kJ/mol |
|---|---|
| Fe2(CO3)3 | -1482.3 |
| HCl | -167.16 |
| FeCl3 | -399.5 |
| H2O | -285.8 |
| CO2 | -393.5 |
6HCl + Fe2(CO3)3 –>3H2O + 2FeCl3 + 3CO2
∆Hfο(reaction)= ∑Hfο(product) – ∑Hfο(reactant)
∆Hfο(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 than the reactants so are stable. They do not react further to 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 do not react back to 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.
Hi…I am Sonali Jham. I have done my Post-Graduation in Chemistry and also completed B. Ed. I am a Teacher and a Dietician by profession.
My hobby is reading and painting.
Let’s connect through LinkedIn-
Hi Fellow Reader,
We're a small team at Techiescience, working hard among the big players. If you like what you see, please share our content on social media. Your support makes a big difference. Thank you!