15 Facts on HBr+CH3COOH:What, How To Balance & FAQs

CH₃COOH is a weak acid and HBr is strong acid. Let us see the reaction of HBr + CH₃COOH.

CH₃COOH naturally occurs by excretion from certain bacteria and HBr is a inorganic compound, soluble in water, colorless gas.

This article will discuss some facts about CH₃COOH and HBr reaction, like net ionic equation, conjugated pair etc.

What is the product of HBr and CH₃COOH

Acetic aldehyde (CH₃CHO) , dibromine (Br₂) and water (H₂O) are the products of HBr+CH₃COOH reaction.
CH₃COOH + HBr = CH₃CHO + Br₂ + H₂O

What type of reaction is HBr and CH₃COOH

CH₃COOH + HBr is a endothermic as well as elimination reaction.

How to balance HBr +CH₃COOH

The reaction CH₃COOH + HBr is balanced using the following steps :
CH₃COOH +HBr = CH₃CHO +Br₂ +H₂O

• Firstly we count the number of atoms on the reactants and product sides.
• If the number of reactant atoms and product atoms are not same then we have to multiply smallest figure according to formula.
• In the above equation, number of H atom and Br atom are not same.
• So,we should multiply HBr by 2.
• Thus the balance equation according to the above points is
• CH₃COOH + 2HBr = CH₃CHO + Br₂ +H₂O

HBr + CH₃COOH titration

Titration is not possible in the HBr +CH₃COOH reaction because strong acid HBr ionize while weak acid CH₃COOH does not ionize.

HBr + CH₃COOH net ionic equation

The net ionic equation for HBr +CH₃COOH is-

CH₃COO^–(Aq) + 2HBr(l) + H₃O⁺(Aq) = CH₃CHO(l) + Br₂(g) + 2H₂O(l)

Follow the steps mentioned below to get net ionic equation.

• CH₃COOH is a weak acid, so it cannot dissociate completely at a time. It dissociates partially in an aqueous solution.
• The dissociation of acetate ions is not the spectator ions.
• CH₃COOH + H₂O = CH₃COO^– + H₃O⁺
• HBr is a strong acid, so it dissociates completely.
• 2HBr = 2H⁺ + 2Br^–
• If we combine equation 1 and 2, we can get below equation
• CH₃COOH + H₂O + 2HBr = CH₃COO^– + H₃O⁺ + 2H⁺ + 2Br^–
• Thus the net ionic equation for the HBr and CH₃COOH reaction is
• CH₃COO^– + H₃O⁺ + 2HBr = CH₃CHO + Br₂ +2H₂O

HBr + CH₃COOH conjugate pairs

The conjugate pairs of the reaction HBr+CH₃COOH are as mentioned below-

• Conjugate base of HBr is Br^– and HBr conjugate acid is H₃O⁺.
• Conjugate base of CH₃COOH is acetate ion CH₃COO^– .

HBr and CH₃COOH intermolecular forces

HBr + CH₃COOH has the following intermolecular forces-

• Dipole – dipole interaction, dispersion forces and hydrogen bonding are present as intermolecular forces in CH₃COOH.
• Dipole – dipole forces are present as intermolecular forces in HBr.

HBr + CH₃COOH reaction enthalpy

For HBr +CH₃COOH the reaction enthalpy value is 210.6 kJ /mol. It is calculated using the values given in the table below.

Compounds	Enthalpy of formation in KJ/mol
HBr	-119.6
CH3COOH	-491
CH3CHO	52
Br2	0
H2O	-285.8

• Reaction enthalpy = (sum of reaction enthalpy of product) – (sum of reaction enthalpy of reactants)
• Reaction enthalpy = [52 + ( – 285.2 ×2)] – [-(2×119.6)- 491] KJ/mol
• Reaction enthalpy = 210.6 KJ/mol

Is HBr + CH₃COOH a buffer solution

HBr + CH₃COOH is not a buffer solution because HBr is a strong acid and CH₃COOH is a weak acid with pH values 0.21 and 2.4 simultaneously.

Is HBr + CH₃COOH a complete reaction

HBr + CH₃COOH is a complete reaction because it gives CH₃CHO, Br₂, H₂O as products.

Is HBr + CH₃COOH an exothermic or endothermic reaction

HBr + CH₃COOH is an endothermic reaction because CH₃COOH being a weak acid does react with HBr, so external energy is required to break the bond.

Is HBr + CH₃COOH a redox reaction

HBr +CH₃COOH is a redox reaction because oxidation state of reactants and products are changed as shown below.

CH₃COO^-1(aq) + H₃O⁺¹(aq) + 2HBr^-1(l) = CH₃CHO^-2(l) + Br₂(g) + 2H₂⁺²O^-2(l)

Is HBr + CH₃COOH a precipitation reaction

HBr + CH₃COOH is not a precipitation reaction because it does not form precipitate. Reactants and products CH₃CHO (acetaldehyde) , Br₂ (dibromine) are miscible in water.

Is HBr + CH₃COOH reversible or irreversible reaction

HBr + CH₃COOH is a reversible reaction because the product CH₃CHO, Br₂, H₂O of the reaction does not remain as residue.

Is HBr + CH₃COOH displacement reaction

HBr +CH₃COOH is not a displacement reaction because addition of 2 Bromine atoms takes place from 2 molecules of HBr to form Br₂ as a product and elimination of H⁺ ion from CH₃COOH took place to form acetate ion in aqueous solution and gives CH₃CHO.

Conclusion

HBr is a strong acid in comparison to CH₃COOH because of these facts reaction of HBr and CH₃COOH takes place as redox reaction, reversible reaction and complete reaction.