21 Facts on HCl + FeSO4 : With Several Elements Reaction


A chemical reaction has reactants and products. Let us see the reaction between hydrogen Chloride and ferrous sulphate.

HCl is a strong acid and FeSO4 is found to be weak acid. The oxidation state of iron in FeSO4 is found to be +2. FeSO4 is also called as green vitriol which has some unique properties. It can reacts with metals like aluminium and certain reagents like KMnO4 to form various products.

In this reaction the oxidation state of iron is retained as it is. Let us discuss about various fact like the mechanism, type of reaction of reaction between HCl and FeSO4 .

What is the product of HCl and FeSO4

HCl or hydrogen chloride react with ferrous sulphate to form ferric chloride, hydrogen sulphide and oxygen. Ferric chloride is a green coloured solution hydrogen sulphide and oxygen is formed as a gas.

2 HCl + FeSO4 —-> FeCl2 + H2S+ 2 O2 .

What type of reaction is HCl + FeSO4

The reaction between HCl and FeSO4 is both displacement reaction and decomposition reaction. Here the hydrogen atom is replaced by iron to form FeCl3 . Also FeSO4 decomposes to release oxygen. The decomposed sulphur of sulphate combines with hydrogen to form hydrogen sulphide.

How to balance HCl + FeSO4

There are different methods to balance chemical equations. Following are the ways to balance HCl + FeSO4 chemical equation.

  • Step 1: Assign different coefficients to each reactants and products.
  • a HCl + b FeSO4 —-> c FeCl2 + d H2S+ e O2
  • Step 2: Make an equation by equating all the coefficient of each element present here.
  • H=a=2d, Cl= a= 2c, Fe= b=c, S= b=d, O= 4b= 2e
  • Step 3 : Solve the equations using gauss elimination method and find the value of the assigned coefficients.
  • Step 4: The value of coefficients of the above equation is
  • a= 2, b=1, c= 1, d= 1, e= 2.
  • Step 5: Substitute the values of these coefficients to in the above equation to get the balanced chemical equation of reaction between HCl and feso4.
  • 2 HCl + FeSO4 —-> FeCl2 + H2S+ 2 O2 .

HCl + FeSO4 Titration

HCl + FeSO4 titration is not able to perform. There is no distinct colour change can be seen.

HCl + FeSO4 net ionic equation

HCl + FeSO4 net ionic equation of a reaction is written by dissociating both reactants and products. Only the reactants which dissociate is considered. The net ionic equation of HCl + FeSO4 is

H++ Cl + Fe2++ SO42- ——> Fe2+ + 2Cl + 2H+ + S2-

Cancelling same ions we get

Fe2+ + SO42- ——> Fe2+ + Cl+ H+ + S2-

HCl + FeSO4 conjugate Pairs

The conjugate base of HCl and hydrogen Sulfide is Cl and SHrespectively. When an acid losts one proton then the ion formed is its conjugate base and when a base abstracts a proton then the ion formed is its conjugate acid.

HCl and FeSO4 intermolecular forces

The force is existing in between HCl + FeSO4 is purely ionic interaction or ionic bond existing in between them. In HCl the proton forms ionic bond with Cl- . Similarly in FeSO4 also ionic interaction holds them together.

HCl + FeSO4 reaction enthalpy

The reaction enthalpy of HCl + FeSO4 reaction is 907.5 kJ/mol. The standard enthalpy of HCl is -92.3 KJ/mol, FeSO4 is -928.4kJ/mol, FeCl2 is -341.79kJ/mol, H2 S is -20.6 kJ/mol and oxygen is 249.19 kJ/mol. Hence (-341.79+-20.6+249.19) -(-92.3+-928.4) = 907.5 kJ/mol.

Is HCl + FeSO4 a buffer solution

HCl a strong acid is present so no buffer solution exist when these both reacts each other. Because buffer solution is made up by mixing a weak acid with its conjugate base.

Is HCl+ FeSO4 a complete reaction

The reaction between HCl and FeSO4 is purely a complete reaction. The two reactants combines together to form iron chloride, hydrogen sulphide and oxygen. All these are stable products.Hence it is a complete reaction.

Is HCl + FeSO4 an exothermic or endothermic reaction

The reaction between HCl + FeSO4 is completely an endothermic reaction. It is because the reaction enthalpy of this reaction is found to be positive. Positive value of reaction enthalpy implies the reaction is endothermic or the reaction takes place by absorbing heat.

Is HCl + FeSO4 a redox reaction

The reaction between HCl + FeSO4 is not a redox reaction. Because the oxidation state of all the atoms in the reactant side or LHS is same as that of the RHS or product side. Either oxidation or reduction takes place here so it is not a redox reaction

Is HCl + FeSO4 a precipitation reaction

HCl + FeSO4 reaction doesn’t yield any precipitate. A precipitation reaction always forms a precipitate after the reaction. When HCl and FeSO4 react each other iron chloride which the green colour is substance is formed along with hydrogen sulphide and Oxygen gas.

Is HCl + FeSO4 reversible or irreversible reaction

The reaction between HCl + FeSO4 is an irreversible reaction. That means the products can be converted to reactants at any condition once the reaction takes place.

Is HCl + FeSO4 displacement reaction

The reaction between HCl + FeSO4 is a type of displacement reaction. Hydrogen in HCl is displaced by iron to form iron chloride. Also sulphur in FeSO4 combines with hydrogen to form hydrogen sulphide.

hcl + feso4
Displacement reaction between HCl and FeSO4

How to balance K2Cr2O7 + FeSO4 + HCl = KCl + CrCl3 + FeCl3 + Fe2 (SO4)3 + H2O

  • Step 1: Assign certain coefficient to each reactants and products in the chemical equation.
  • a K2Cr2O7 + b FeSO4 + c HCl = d KCl + e CrCl3 + f FeCl3 + g Fe2 (SO4 )3+ h H2O
  • Step 2: Equate the coefficient of same elements to form an equation.
  • K= 2a=d, cr= 2a =e, O =7a= 4b =12g h, Fe= b= f =2g, S= b =3g, H =c= 2h , Cl =c =d= 3e= 3f.
  • Step 3: Solve the equations to get the value of coefficients by gauss elimination method. The values of the coefficients are as follows
  • a =1, b= 6, c =14, d =2, e =2, f =2, g =2, h= 7.
  • Step 4: Substituting the value of the coefficients in the above equation we get the balanced chemical equation.
  • K2 Cr2 O 7 + 6 FeSO4 + 14HCl = 2KCl + 2CrCl3 + 2 FeCl3 + 2Fe2(SO4 )3+ 7H2O

How to balance KMnO4 + HCl + FeSO4 = KCl + MnSO4 + H2O + FeCl3 + Cl2

  • Step 1: Assign certain coefficient to the following chemical equation like
  • a KMnO4 + b HCl + c FeSO4 = d KCl + e MnSO4 + f H2O + g FeCl3 + hCl2
  • Step 2: Make a proper equation by equating the coefficient of same elements
  • K= a =d, Mn= a =e, O= 4a =4c =4e =f, H =b= 2f, Cl =b= d= 3g= 2h, Fe= c= g, S =c =e.
  • Step 3: By solving the above equation by using gauss elimination method the value of the coefficiences found to be
  • a =1, b= 8, c =1, d =1, e =1, f =4, g =1, h= 2.
  • Step 4: On substitute the of above coefficients we get the balanced in the chemical equation.
  • KMnO4 + 8 HCl + FeSO4 = KCl + MnSO4 + 4H2O + FeCl3 + 2Cl2

How to balance PbCrO4 + HCl+ FeSO4 = Cr2 (SO4 )3+ FeCl3 + H2O+ PbCl2 + Fe2 (SO4 )3

  • Step 1: Assign certain coefficient to the following chemical equation like
  • a PbCrO4 + b HCl+ c FeSO4 = d Cr2 (SO4 )3 + e FeCl3 + f H2O+ g PbCl2 + h Fe2 (SO4 )3..
  • Step 2: Make a proper equation by equating the coefficient of same elements
  • Pb =a =g, Cr =2d, O =4a =4c =12d =f =12h, H= b =2f, Cl= b= 3e= 2g, Fe =c =e =2h, S =c= 3d= 3h.
  • Step 3: By solving the above equation by using gauss elimination method the value of the coefficiences found to be
  • a =2,b= 16, c =6, d =1, e =4, f =8, g =2, h= 1.
  • Step 4: On substitute the of above coefficients we get the balanced in the chemical equation.
  • 2PbCrO4 + 16HCl+ 6 FeSO4 = Cr2 (SO4 )3+ 4FeCl3+ 8H2O+ 2PbCl2+ Fe2 (SO4 )3.

How to balance KClO3 + FeSO4 + HCl= KCl+ Fe2 (SO4 )3 + FeCl3 + H2O.

  • Step 1: Assign certain coefficient to the following chemical equation like
  • a KClO3 + b FeSO4 + c HCl= d KCl+ e Fe2 (SO4 )3 + f FeCl + g H2O.
  • Step 2: Make a proper equation by equating the coefficient of same elements
  • K= a =d, Cl =a= c= d =3f, O= 3a =4b= 12e= g, Fe= b= 2e= f, S= b =3e
  • Step 3: By solving the above equation by using gauss elimination method the value of the coefficiences found to be
  • a =1,b= 6, c =6, d =1, e =2, f =1, g =3.
  • Step 4: On substitute the of above coefficients we get the balanced in the chemical equation.
  • KClO3 + 6FeSO4+ 6HCl= KCl+ 2Fe2(SO4 )3 + FeCl3 + 3 H2O.

How to balance NaNO2 + FeSO4 + HCl = FeCl3 + NO + Na2SO4 + H2O + H2SO4 .

  • Step 1: Assign certain coefficient to the following chemical equation like
  • a NaNO2 + b FeSO4 + c HCl = d FeCl3 + e NO + f Na2 SO 4 + g H2O + h H2SO4 .
  • Step 2: Make a proper equation by equating the coefficient of same elements
  • Na= a =2f, N =a =e, O =2a= 4b =e =4f =g= 4h, Fe= b =d, S =b= f= h, H= c= 2g =2h, Cl= c =3d
  • Step 3: By solving the above equation by using gauss elimination method the value of the coefficiences found to be
  • a =2,b= 2, c =6, d =2, e =2, f =1, g =2, h=1.
  • Step 4: On substitute the of above coefficients we get the balanced in the chemical equation.
  • 2NaNO2 + 2FeSO4 + 6HCl = 2FeCl3 + 2NO + Na2SO4 + 2H2O + H2SO4 .

How to balance HClO3 + H2SO4 + FeSO4 = Fe2 (SO4 )3 + HCl + H2O

  • Step 1: Assign certain coefficient to the following chemical equation like
  • a HClO3 + b H2SO4 + c FeSO4 = d Fe2 (SO4 )3 + e HCl + f H2O.
  • Step 2: Make a proper equation by equating the coefficient of same elements
  • H =a= 2b =e =2f, Cl =a =e, O =3a= e, S =b =c= 3d, Fe =c =2d
  • Step 3: By solving the above equation by using gauss elimination method the value of the coefficiences found to be
  • a =1,b= 3, c =6, d =3, e =1, f =3.
  • Step 4: On substitute the of above coefficients we get the balanced in the chemical equation.
  • HClO3 + 3H2SO4 + 6FeSO4 = 3 Fe2 (SO4 )3 + HCl + 3 H2O.

Conclusion

HCl is a liquid with intense fumes reacts with FeSO4 The reaction is found to be takes place by absorbing heat from surroundings and it’s reaction enthalpy is positive. The products formed is hydrogen sulphide a gas, and oxygen along with ferric chloride.

Aparna Dev

Hi... I am Aparna Dev, a chemistry Postgraduate with a good understanding of chemistry concepts. I am working in Kerala Minerals and Metals Limited Kollam with experience in the development of electrocatalysts as a part of post graduate thesis. Let's connect through LinkedIn-https://www.linkedin.com/in/aparna-dev-76a8751b9

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