15 Facts on HBr + NH4OH: What, How To Balance & FAQs

Hydrobromic acid (HBr) and ammonium hydroxide (NH4OH) are two inorganic substances which interact with each other. Let us get into more detail now.

HBr is a halogen acid, while NH4OH is a base with an ammonia concentration of between 10 and 35 percent in water. The reaction medium’s pH remains less than 7 when they react.

Inherent properties of the reaction between HBr and NH4OH will be discussed in this article, including reaction products, enthalpy, intermolecular forces, etc.

1. What is the product of HBr and NH4OH?

HBr + NH4OH when combine, the end products are ammonium bromide (NH4Br) and water (H2O). 

HBr+ NH4OH-> NH4Br + H2O

2. What type of reaction is HBr + NH4OH?

HBr+NH4OH is an acid-base reaction, else known as a neutralization reaction. HBr+ NH4OH reaction is also an example of a double displacement reaction.  

3.How to balance HBr + NH4OH?

HBr+NH4OH equation will be balanced when the H, Br, N, and O atoms must all be present in equal amounts on both side of the equation.

  • We label the four molecules with the letters A, B, C, and D, as there are four. The answer is displayed as follows:
  • A HBr + B NH4OH = C NH4Br + D H2O
  • The number of coefficients given as alphabets in the reactants and products is now calculated using the right values.
ElementReaction sideProduct side
Hydrogen1A+5B4C+2D
Bromine1A+0B1C+0D
Nitrogen0A+1B1C+0D
Oxygen0A+1B0C+1D
Values of coefficient on reactant and product sides
  • The coefficient and variables required to balance the equation in Step 3 are acquired using the Gaussian elimination approach. The reactant and product sides now contain an equal number of each element.
ElementReaction sideProduct side
Hydrogen66
Bromine11
Nitrogen11
Oxygen11
Balanced number of each atom on reactant and product sides
  • The equation is already balanced.
  • HBr + NH4OH= NH4Br + H2O.

4. HBr + NH4OH titration

HBr + NH4OH titration is an acid-base titration. The titration of HBr and NH4OH involves the following steps.

Apparatus Used:

  • Conical flask, burette, burette stand, volumetric flask, beakers, and measuring cylinders are the instruments used.

Titre and titrant:

  • HBr is the titre in this reaction. It’s concentration will be determined.
  • NH4OH is the titrant. It’s concentration is already known.

Indicator:

Procedure:

  • Cleaning, rinsing, and then filling the burette with the NH4OH solution. Recording the burette’s initial reading.
  • Pipette 20 mL of the HBr solution into a transparent titration flask.
  • To check the reaction’s end point, add a few drops of methyl orange indicator to the titration flask.
  • Drop by drop; add ammonium hydroxide solution to the titration flask until the solution’s color changes.
  • Take note of the burette reading when the color of the solution changed, and determine how much ammonium hydroxide solution was needed to neutralize the HBr solution.
  • Run the test again to obtain more concurrent readings.

5. HBr + NH4OH net ionic equation

HBr + NH4OH reaction’s net ionic equation is,

H+(aq.) + OH– (aq.) = H2O(l).

  • The generic molecular equation is written in balance.
  • HBr + NH4OH = NH4Br + H2O.
  • Indicate each compound’s chemical state, such as solid, liquid, gas, or aqueous solution.
  • HBr (aq.) + NH4OH (aq.) = NH4Br (aq.) + H2O (l)
  • Create ions from the soluble chemicals.
  • H+ (aq.), Br (aq.), NH4+ (aq.), and OH (aq.) are equal to NH4+ (aq.), Br (aq.), and H2O (l).
  • Ions that are present on both sides are canceled out to obtain the net ionic equation.
  • H+ (aq.) + OH (aq.) = H2O (l) is the net ionic equation as a result.

6. HBr+ NH4OH conjugate pairs

HBr + NH4OH conjugate pairs are,

  • HBr is an acid with the conjugate base Cl.
  • NH4OH is a base with the conjugate acid of NH4+

7. HBr and NH4OH intermolecular forces

HBr+NH4OH display the following intermolecular forces:

  • The forces that affect how HBr molecules interact are dipole-dipole and London dispersion.
  • Hydrogen bonds are a significant intermolecular force in the NH4OH molecule.
  • Ionic bonds mediate the intermolecular force between NH4Br molecules.
  • Intermolecular forces in water molecules include hydrogen bonds, dipole-induced dipole forces, and London dispersion forces.

8. HBr+ NH4OH reaction enthalpy

HBr + NH4OH reaction enthalpy is -437.48 KJ/mol.

CompoundMolesEnthalpy of formation, ΔH0f (KJ/mol)
HBr1-39.12
NH4OH1-80
NH4Br1-270.8
H2O1-285.8
Values of enthalpy

Use the following formula to compute the reaction’s standard enthalpy:

  • ΔH0f (reaction) = ΣΔH0f (product) – ΣΔH0f (reactants)  
  • The reaction enthalpy of HBr and NH4OH is: [-270.8 – 285.8- {(-39.12) – 80)}] KJ/mol= -437.48KJ/mol.

9. Is HBr + NH4OH a buffer solution?

HBr + NH4OH is not a buffer solution because HBr is a very potent acid.

10. Is HBr + NH4OH a complete reaction?

HBr+ NH4OH is a complete reaction because the final products include ammonium bromide (NH4Br) and release water, two stable compounds.

11. Is HBr+ NH4OH an exothermic or endothermic reaction?

HBr + NH4OH is an exothermic reaction since heat is emitted during the process and the reaction enthalpy has a negative value.

12. Is HBr + NH4OH a redox reaction?

HBr + NH4OH is not a redox reaction since each atom’s oxidation status do not change during the chemical reaction.

13. Is HBr + NH4OH a precipitation reaction?

HBr + NH4OH is not a precipitation reaction since all of the end products are soluble and no precipitates remain when the reaction is finished.

14. Is HBr+ NH4OH reversible or irreversible reaction?

HBr+ NH4OH reaction is irreversible because it falls under the category of a neutralization reaction, in which HBr interacts with NH4OH to produce NH4Br salt and water that cannot be reversed once produced. 

15. Is HBr + NH4OH displacement reaction?

HBr + NH4OH is a double displacement reaction. In this reaction, NH4+ displaces hydrogen from hydrobromic acid and combines with bromine atoms to create NH4Br salt in a double displacement reaction. H+ then reacts with the OH ion to form water.

HBr NH4OH
Double displacement reaction

Conclusion

In conclusion, HBr+NH4OH is an acid-base reaction that results in ammonium bromide and water. No precipitation and redox property change is noticed in this reaction.