15 Facts on HBr + NH3: What, How To Balance & FAQs

A chemical reaction between hydrobromic acid (HBr) and ammonia (NH₃) can occur in both the gas. Let us go over each trait in more detail.

Ammonia is a weak base, but hydrobromic acid is a strong acid. These two substances react to form an acidic salt. At room temperature, the reaction’s pH stays below 7.

This post will detail the net ionic reaction, titration, buffer solution, and many other topics connected to the HBr and NH₃ reactions.

1. What is the product of HBr and NH₃?

HBr + NH₃ reaction gives ammonium bromide (NH₄Br), a white solid, as a product.

HBr +NH₃ -> NH₄Br

2. What type of reaction is HBr + NH₃?

HBr+ NH₃ is a combination reaction in which only one single product is formed by combining two chemical compounds.

3. How to balance HBr + NH₃?

HBr + NH₃ reaction is to be balanced and the H, Br, and N atoms must all be in equal numbers on either side of the equation.

HBr+ NH₃= NH₄Br

• Since there are three molecules, we first give them the labels A, B, and C. The response appears as follows:
• A HBr+ B NH₃ = C NH₄Br
• The correct values are now used to calculate the number of coefficients indicated as alphabets in the reactants and products.

• The Gaussian elimination method is used to acquire the coefficient and variables needed to balance the equation in Step 3.
• There is now an equal amount of each element on the reactant and product sides.

• Thus, the balanced equation is,
• HBr+ NH₃= NH₄Br

4. HBr + NH₃ titration

HBr+ NH₃ titration is done by the volumetric analysis process using a pH indicator.

Utilized equipments:

• Tools utilized are the measuring cylinder, conical flask, burette, and beaker.

Titre and Titrant:

• HBr is the titre whose concentration needs to be analyzed.
• NH₃ is the titrant here whose concentration is known.

Indicator:

• The “Methyl red” indicator is employed for the titration.

Procedure:

• Create a batch solution with 250 ml of HBr and NH₃, measure it with a cylinder, and then add a few drops of the indicator. The color will switch from red to yellow at the equivalency point when n(HBr) = n(NH₃). (n= number of moles).

Neutralization reaction:

• The neutralizing reaction is as follows: HBr (aq) + NH₃ (aq) -> NH₄Br (aq)
• Because HBr is a powerful acid and completely dissociates, this reaction is completed. When the H⁺ ions interact with the NH₃, NH₄⁺ ions are created.
• The HBr, in this situation, is the limiting reactant in this neutralization process. Because NH₃ is not the limiting reactant, some are left over, and some NH₄Br is produced.

5. HBr + NH₃ net ionic equation

Net ionic equation for HBr+ NH₃ reaction is: NH₃(aq) + H⁺(aq) = NH₄⁺(aq) .

• A molecular equation must take into account and balance each compound’s phase.
• HBr(aq) + NH₃(aq)= NH₄Br(aq)
• It is necessary to convert the aqueous salts or chemicals in the equation into ions. Since weak electrolytes can dissociate, only strong electrolytes should be dissolved.
• H⁺(aq), Br^–(aq), and NH₃ (aq) combine to form NH₄⁺(aq) and Br^–(aq)
• We remove the spectator ions to determine the species involved in the reaction.
• The net ionic equation is as follows:
• NH₃(aq) + H⁺(aq) = NH₄⁺(aq)  

6. HBr+ NH₃ conjugate pairs

HBr+NH₃ conjugate pairs differ from one proton. It is as follows:

• HBr is an acid with the conjugate base Cl^–
• NH₃ is a base with the conjugate acid of NH₄⁺

7. HBr and NH₃ intermolecular forces

HBr+NH₃ shows the following intermolecular forces:

• HBr shows dipole-dipole force as it is a polar molecule.
• HBr shows a very weak London dispersion force.
• NH₃ shows hydrogen bonding as acidic protons are attached to nitrogen atom.
• NH₃ shows dipole-dipole interaction as it has a polar structure.
• NH₃ also projects dispersion forces and Van der Waals due to high dipole moment

8. HBr+ NH₃ reaction enthalpy

The enthalpy or reaction between HBr + NH₃ is -277.68 KJ/mol.

• Use the following formula to compute the reaction’s standard enthalpy:
• ΔH⁰_f (reaction) = ΣΔH⁰_f (product) – ΣΔH⁰_f (reactants)  
• The reaction enthalpy of HBr and NH₃ is: [-270.8- {(-39.12) + 46)}] KJ/mol= -277.68KJ/mol.

9. Is HBr + NH₃ a buffer solution?

HBr + NH₃ acts as a buffer solution because only NH₄⁺ and NH₃ are present in the solution, along with a few Br^– spectator ions and water, which serves as our solvent.

10. Is HBr + NH₃ a complete reaction?

HBr+NH₃ reaction completes because HBr is a potent acid and completely dissociates. The H⁺ ions react with the NH₃ to create NH₄⁺ ions.

11. Is HBr+ NH₃ an exothermic or endothermic reaction?

HBr + NH₃ interaction is exothermic, releasing a significant quantity of heat while it takes place.

12. Is HBr+ NH₃ a redox reaction?

HBr + NH₃ is not a redox reaction because neither the oxidation state of the chemical molecule in the reactant nor that of the product changes during the HBr + NH₃ reaction. Instead, hydrogen ions are transferred.

13. Is HBr+ NH₃ a precipitation reaction?

HBr + NH₃ is not a precipitation reaction as ammonium bromide, a salt that is easily soluble in water is produced as a byproduct of the reaction.

14. Is HBr+ NH₃ reversible or irreversible reaction?

HBr + NH₃ is an irreversible reaction because the end products, ammonium bromide, cannot be revert back to initial reactants.

15. Is HBr + NH₃ displacement reaction?

HBr + NH₃ is not a displacement reaction. Because there is no ion exchange occurring during the reaction, HBr + NH₃ cannot be classified as a displacement reaction.

Conclusion

Ammonium bromide salt is produced in the HBr+ NH₃ reaction, which illustrates a strong acid-weak base reaction. It is utilized in photography, films, plates, and sheets. It also serves as a fireproofing agent for wood and a corrosion inhibitor.

Ishita Ghosh

Hey readers, I am Ishita Ghosh. I have done my Master’s in Chemistry. My area of specialization is Inorganic Chemistry. The true way to comprehend chemistry is to understand it from its grassroots level. My effort is to share every bit of knowledge in chemistry I have so that it helps you for a better grasp on this subject.