15 Facts on H2SO3 + FeCl2 : What, How To Balance & FAQs

Sulfurous acid is an Oxoacid of sulphur and it has a four hydrogen bond acceptor count. Let us see a few facts on H₂SO₃ + FeCl₂.

Sulfurous acid has a pungent odor of burning sulfur. Its molecular weight is 82.08. Its solubility is 558.5 mg/ml. FeCl₂ is a greenish-white crystalline solid dissolved in water and is also soluble in water. Its heavy atom count is three.

Let us discuss the reaction type and balancing in this article.

What is the product of H₂SO₃ and FeCl₂?

H₂SO₃ and FeCl₂ have the following products. Hydrochloric acid (HCl), and Ferrous sulphite (FeSO₃).

FeCl₂ + H₂SO₃ → 2HCl + FeSO₃ .    

What type of reaction is H₂SO₃ + FeCl₂?

The reaction between H₂SO₃ + FeCl₂ is a double displacement reaction and also an exothermic reaction as heat is liberated.

How to balance H₂SO₃ + FeCl₂?

This reaction between H₂SO₃ + Sr(OH)₂ is not balanced as the number of molecules in the reactants and product are not equal.

FeCl₂ + H₂SO₃ → 2HCl + FeSO₃       

• So, we have to balance the reaction subsequently.
•  We should first assign coefficients to all molecules present in the reaction. We use P, Q, R, and S as we have four molecules. The reaction will look like this,
• P FeCl₂ + Q H₂SO₃ → R HCl + S FeSO₃       
• The labeled coefficients can be used as alphabets for reactants and products.
• Fe = P+ S, O=3Q + 3S, H=2Q+R, Cl = 2P+R,  S= Q + S .
• We can calculate the coefficient values using by Gaussian elimination method.
• P=1, Q=1,R=2,S=2
• So, the balanced equivalence of the reaction is,
• FeCl₂ + H₂SO₃ → 2HCl + FeSO₃       

H₂SO₃+ FeCl₂ titration?

In the reaction between H₂SO₃ and FeCl₂ titration does not occur, as robust acids like H₂SO₃  pKa value of 1.181 and cannot be used for titration. FeCl₂ can cause skin allergies.

H₂SO₃+ FeCl₂ net ionic equation?

H₂SO₃ + Sr(OH)₂ has the following Ionic equation,

Fe²⁺ + 2Cl ^1- + 2H⁺ + 2SO₃^2- → Fe²⁺ + 2Cl^–  + 2H⁺ + SO₃^2-

• We should follow the steps to arrive at the net ionic equation.
• Write the balanced chemical equation and represent the states (physical) of reactants and products.
• FeCl₂(aq) + H₂SO₃ (aq)  → 2HCl  (aq) + FeSO₃  (aq)       
• Salts, acids, and bases dissociate into ions, but pure substances and molecules fail to do so. The final equation after dissociation is
• Fe²⁺ + 2Cl ^1- + 2H⁺ + 2SO₃^2- → Fe²⁺ + 2Cl^–  + 2H⁺ + SO₃^2-

H₂SO₃ + FeCl₂ conjugate pairs?

H₂SO₃  + FeCl₂ has the following conjugate pairs, 

• H₂SO₃ is the conjugate acid of HO₃S^–
• Cl^2- is the conjugate pair of Iron in FeCl₂

H₂SO₃ and FeCl₂ intermolecular forces?

The reaction between H₂SO₃ and FeCl₂ has the following intermolecular forces,

• FeCl₂ has an Ionic force
• H₂SO₃  has Hydrogen bonding and dispersion forces.

H₂SO₃+ FeCl₂ reaction enthalpy?

H₂SO₃ + FeCl₂ reaction, their enthalpy has not been established because of stochiometric conditions.

Is H₂SO₃ + FeCl₂ a buffer solution?

H₂SO₃ + FeCl₂ as a buffer is not possible as H₂SO₃ is used. A strong acid will not form a buffer solution.

Is H₂SO₃ + FeCl₂ a complete reaction?

H₂SO₃ + FeCl₂ is a complete reaction with Hydrochloric acid (HCl), and Ferrous sulphite (FeSO₃) as their products.

FeCl₂ + H₂SO₃ → 2HCl + FeSO₃       

Is H₂SO₃ + FeCl₂ an exothermic or endothermic reaction?

H₂SO₃ + FeCl₂ is an Exothermic reaction because heat is liberated.

Is H₂SO₃ + FeCl₂ a redox reaction?

H₂SO₃ + FeCl₂ is not a redox reaction as there is no change is observed in the oxidation number of Fe.

Is H₂SO₃ + FeCl₂ a precipitation reaction?

H₂SO₃ + FeCl₂ is a precipitation reaction in which FeSO₃  is obtained as a residue.

Is H₂SO₃+ FeCl₂ reversible or irreversible reaction?

H₂SO₃ + FeCl₂ is an irreversible reaction because heat is liberated.

Is H₂SO₃ + FeCl₂ displacement reaction?

H₂SO₃ + FeCl₂ is a double displacement reaction because Fe displaces H.

Conclusion

In conclusion, the reaction between H₂SO₃and FeCl₂is a double displacement reaction. No buffer solution is formed as strong acid is used. FeCl₂ plays an important role in painting and mineral extraction and H₂SO₃ is used in biocides.