fecl2 + hcl

HCl + FeCl2 is a notation of a chemical reaction happens between HCl and FeCl2 that gives out some specific products as well. Let us focus on the facts about the reaction here.

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The foremost fact about the reaction reveals that Hydrochloric acid (HCl) is a strong acid and Ferrous chloride (FeCl2) is a neutral chemical compound. They are reactive with each other. FeCl2 is found as a paramagnetic compound that influence change in colour in presence of dilute HCl.

Facts about the reactions such as its balanced structure, result of titration, intermolecular forces, buffer solutions and others will be discussed throughout this article.

What is the product of HCL and FeCl2?

The main product of HCl + FeCl2 is FeCl3 (Ferric chloride) and Hydrogen gas. The complete reaction is as follows:

HCl + FeCl2 = FeCl3 + H2.

What type of reaction are HCL + FeCl2?

HCL + FeCl2, this chemical reaction is considered as a simple combination reaction as Cl in Hydrochloric acid breaks bond with Hydrogen and is added with FeCl2 lớn make FeCl3.

How lớn balance HCL + FeCl2

The process of balancing the general equation is given below with step-by-step knowledge.

Step 1: Finding the number of atoms in reactants and products

This is the fundamental step lớn find the number of participated atoms in reactants and the products. The general equation is displaying that in reactants 1 H, 3 Cl and 1 Fe atom is present. In products 1 Fe, 3 Cl and 2 H is present.

HCl + FeCl2 = FeCl3 + H2

Step 2: Arranging the similarity between the number of molecules in reactants and products

The reaction between HCl and FeCl2 is balanced by arranging the same number of molecules or atoms. By multiplying 3 with HCl and 2 with FeCl3, the first attempt of balancing has been carried out.

3HCl + FeCl2 = 2FeCl3 + H2

Step 3: Putting the required numbers before the compounds

In this step, multiplication of 2 with HCl and 2 with FeCl2 and 2 with FeCl3 has been done lớn balance the equation. Still the equation is found lớn be unbalanced.

2HCl + 2FeCl2 = 2FeCl3 + H2

Step 4: Writing the balanced equation

Finally, 2 Fe, 4 Cl and 2 H has been arranged in each side of the equation. Therefore, the balanced chemical equation of the reaction is 2HCl + 2FeCl2 = 2FeCl3 + H2

HCL + FeCl2 titration

Titration does not take place for the solution of FeCl2 and HCl. As the reaction does not take place naturally, it is conducted in laboratory by adding specific amount of reactants and titration becomes unnecessary here.

HCL + FeCl2 net ionic equation

The net ionic equation of the reaction between Hydrochloric acid and ferrous chloride is-

2FeCl2 + 2HCl = H2 + 2FeCl3.

HCL + FeCl2 conjugate pairs

HCl + FeCl2 is not a conjugate pair as HCl and FeCl2 tự not conjugate with each other lớn size a neutralized compound. Conjugate base of HCl is found lớn be Cl ion and H+ is its conjugate acid. In FeCl2, Cl can be called as iron’s conjugate base.

HCL and FeCl2 intermolecular forces

Intermolecular force between H and Cl atoms in HCl is quite strong but it has a tendency lớn leave proton in reactions. The intermolecular force between two Cl atoms and one Fe is stronger kêu ca the force works inside HCl.

HCL + FeCl2 reaction enthalpy

The reaction enthalpy of HCl + FeCl2 is 4927 KH/mol. The reaction enthalpy of HCl + FeCl2 is calculated below in systematic way.

  • Enthalpy = (bond energy of H-Cl) – (lattice energy of FeCl2)
  • Bond energy of HCl = 432 KJ/mol.
  • Lattice energy of FeCl2 = – 5359 KJ/mol
  • Enthalpy of HCl + FeCl2 = (432 – 5359) KJ/mol = – 4927 KH/mol

Is HCL + FeCl2 a buffer solution?

HCl + FeCl2 is not a buffer solution as the HCl is a strong acid which makes the solution acidic with pH level of less kêu ca 7.

Is HCL + FeCl2 a complete reaction?

HCl + FeCl2 can be considered a complete reaction after it produces the expected products.

Is HCL + FeCl2 an exothermic or endothermic reaction?

The reaction between HCl and FeCl2 is an exothermic reaction which means the reaction release heat while making the products.

Is HCL + FeCl2 a redox reaction?

HCl + FeCl2 reaction is not a redox reaction. However it is an oxidation reaction and here only HCl losses a proton (H+) which further makes Titrum being added with another proton (H+).

Is HCL + FeCl2 a precipitation reaction?

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HCl + FeCl2 reaction can be considered as a precipitation reaction as the major product of this reaction that is FeCl3 comes out with red brown precipitation.

Is HCL + FeCl2 reversible or irreversible reaction?

HCl + FeCl2 is an irreversible reaction as it cannot take place in the backward direction.

Is HCL + FeCl2 displacement reaction?

HCl + FeCl2 reaction is a single displacement reaction. In this reaction only one Chlorine atom is displaced from HCl lớn another reactant that is FeCl2.

How lớn balance FeCl2 + KNO3 + HCl = FeCl3 + NO + H2O + KCl?

The systematic process of balancing the chemical equation is designed below:

Step 1: Finding the number of atoms in reactants and products

The general equation is showing that 1 Fe, 1 K, 3 Cl, 3 O, 1 H and 1 N is there is reactants. In products there are 1 Fe, 1 N, 4 Cl, 2 O, 2 H and 1 K is there. Therefore is clear that the equation is not balanced yet.

FeCl2 + KNO3 + HCl = FeCl3 + NO + H2O + KCl

Step 2: Arranging the numbers of molecules in reactants and products

For arranging the required numbers of atoms at first 2 is multiplied with Fecl2 and 2 is multiplied with FeCl3 as well. Still the equation is found lớn be unbalanced.

2FeCl2 + KNO3 + HCl = 2FeCl3 + NO + H2O + KCl

Step 3: Multiplying the required numbers before the compounds

The required number lớn balance the element by denoting same production amount of the elements is done in the next step. 3 is multiplied with FeCl2 and 3 is multiplied with FeCl3 in this step.

3FeCl2 + KNO3 + HCl = 3FeCl3 + NO + H2O + KCl

Step 4: Writing the balanced equation

After balancing it has been identified that in each side 3 Fe, 1 K, 4 H, 10 Cl, 1 N and 3 O are present. Therefore, the final balanced chemical equation for the mentioned reaction is as follows:  

3FeCl2 + KNO3 + 4HCl = 3FeCl3 + NO + 2H2O + KCl.

How lớn balance KMnO4 + HCl + FeCl2 = FeCl3 + MnCl2 + KCl + H2O?

The procedure of balancing the equation is arranged below by formatting the steps below:

Step 1: Finding the number of atoms in reactants and products

The fundamental step it has been found that in general equation, 1 K, 1 Mn, 4 O, 1 H, 1 Fe, 3 Cl are present in reactants. In products, 1 Fe, 4 Cl, 1 Mn, 1 K, 2 H, 1 O is present. Therefore, it is clear that the equation is not balanced.

KMnO4 + HCl + FeCl2 = FeCl3 + MnCl2 + KCl + H2O

Step 2: Arranging the numbers of molecules in reactants and products

This step significantly indulges the arrangement of numbers that are required lớn make similarity between element is reactants and products. 4 is multiplied first with KMnO4, FeCl2 and KCl. The equation is not balanced yet.

4KMnO4 + HCl + FeCl2 = 4FeCl3 + MnCl2 + 4KCl + H2O

Step 3: Putting the required numbers before the compounds

In this step 4 is multiplied with KMnO4 and H2O, HCl is multiplied with 8 and FeCl3 is multiplied with 5 but the equation still possesses a little error.

4KMnO4 + 8HCl + FeCl2 = 5FeCl3 + MnCl2 + KCl + 4H2O

Step 4: Writing the balanced equation

It has been calculated that multiplying 5 with FeCl2 would be correct instead of putting 4 before KMnO4. Now in each side, 1 K, 1 Mn, 4 O, 8 H, 10Cl, 5 Fe is present by balancing the whole equation. The balanced equation is given below:

KMnO4 + 8 HCl + 5 FeCl= 5 FeCl3 + MnCl2 + KCl + 4 H2O.


The reaction between HCL and FeCl2 is not much stable as both the reactants are highly stable in nature. Therefore, the forcing the compounds this reaction is done in chemical labs. External factors such as heat, pressure and others kept normal as much as possible for preceding the reaction.

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