15 Facts on H2SO4 + NH4Br: What, How To Balance & FAQs

Ammonium bromide (NH₄Br) is a salt. Sulphuric acid (H₂SO₄) is used as a catalyst in some reactions. Let us discuss some reactions and other properties of H₂SO₄ + NH₄Br.

Ammonium bromide is a crystalline compound which is present in white color crystals. It is a weak acidic in nature and is soluble in the water and other organic compounds. Sulphuric acid is an inorganic strong acid and the nature of this acid is mineral. It is corrosive in nature, non-flammable, oxidizing agent.

In detail,we are going to learn some key aspects of H₂SO₄ + NH₄Br reactions, products, net ionic reactions, intermolecular forces, and buffer solutions.

What is the product of H₂SO₄ and NH₄Br

H₂SO₄ + NH₄Br form ammonium hydrogen sulfate(NH₄HSO₄) and hydrogen bromide(HBr) and also form ammonium sulfate (NH₄)₂SO₄ and hydrogen bromide.

2NH₄Br + H₂SO₄  →  (NH₄)₂SO₄ + 2HBr

NH₄Br + H₂SO₄    →  NH₄HSO₄ + HBr

What type of reaction is H₂SO₄ + NH₄Br

H₂SO₄ + NH₄Br is a double displacement reaction and acid-base reaction.

How to balance H₂SO₄ + NH₄Br 

The unbalanced equation for H₂SO₄ + NH₄Br is written below-

NH₄Br + H₂SO₄   →  (NH₄)₂SO₄ + HBr

For balancing this reaction, we should follow these steps which is mentioned below-

• In this reaction S, O, Br  atoms are equal on both the reactant and the product side of the equation.
• The number of NH₄ compounds on both sides are not equal. For balancing this we should multiply it by 2 on the reactant side.
• 2NH₄Br + H₂SO₄   →  (NH₄)₂SO₄ + HBr
• After balancing this number of Br atoms is increased on the reactant side.
• Now we will multiply HBr by 2, so the number of H atoms and Br atoms will become equal on both sides.
• Thus, the final balanced reaction for H₂SO₄ + NH₄Br is-
• 2 NH₄Br + H₂SO₄   →  (NH₄)₂SO₄ +2 HBr

H₂SO₄ + NH₄Br Titration

To estimate the salt NH₄Br by H₂SO₄, titration is carried out.

Apparatus

• Pipette
• Burette
• Beaker
• Volumetric flask
• Conical Flask

Indicator

The phenolphthalein is using as an indicator in acid-base titration.

Procedure

• In the first step weigh the sample of ammonium bromide and dissolve in normal water and mix it well in a conical flask.
• Now add this sample preparation into the burette.
• The titrant H₂SO₄ is taken into the pipette and poured into the conical flask.
• Add that unknown sample of (NH₄Br) into the conical flask drop wise.
• When a reaction occur in a flask than add the indicator.
• The indicator phenolphthalein is added and color of the reaction becomes pink and then it will disappear at the end point.
• The above process is repeated three times for accurate readings.
• The concentration of the solution is calculated by m₁v₁=m₂v₂.

H₂SO₄+NH₄Br net ionic equation

The net ionic equation for H₂SO₄+NH₄Br is not possible as all the ions present in this reaction are spectator ions and because of this, is not able to give net ionic equation.

H₂SO₄ + NH₄Br conjugate pairs

In this reaction of H₂SO₄ + NH₄Br the available conjugated pairs are as follows.

• The conjugate acid of H₂SO₄ = HSO₄^–
• The conjugate acid of NH4⁺ = NH₃
• The conjugate acid of HSO₄^–= SO₄^-2

H₂SO₄ and NH₄Br intermolecular forces

The H₂SO₄+NH₄Br has the following intermolecular forces-

• The H₂SO₄ compound has dipole-dipole interaction, hydrogen bonding, and vanderwall dispersion. The hydrogen bonding is the strongest bonding for H₂SO₄.
• The NH₄Br contains ionic forces because the compound has ammonia and bromide ions.

H₂SO₄ + NH₄Br reaction enthalpy

The reaction enthalpy of H₂SO₄+NH₄Br is -101.9 KJ/mol. It is calculated by using the values given in the table below.

Compound	Enthalpy of formation in KJ/mol
NH4Br(S)	-270,8
H2SO4 (aq)	-8114
(NH4)2SO4 (aq)	-1180.9
HBr(g)	-36.40

• ∆H=∆H(reactant)-∆H(product)
• ∆H=[2(-270.8)+(-814) – (-1180.9)+2(-36.4)] kJ/mol
• ∆H=-101.9 kJ/mol

Is H₂SO₄+NH₄Br a buffer solution

In H₂SO₄+NH₄Br reaction buffer solution is not possible because the H₂SO₄ acts as a strong acid and these types of compounds do not participate in the formation of buffer solutions.

Is H₂SO₄+NH₄Br a complete reaction

H₂SO₄+NH₄Br is a complete reaction because after the formation of (NH₄)₂SO₄ and HBr gas, no further reaction is possible as these are complete products.

Is H₂SO₄+NH₄Br an exothermic or endothermic reaction

H₂SO₄+NH₄Br reaction is exothermic in nature, as the overall reaction enthalpy is negative 101.9kJ/mol, and according to thermodynamics first law heat is released from the reaction.

Is H₂SO₄+NH₄Br a redox reaction

H₂SO₄+NH₄Br is not a redox type reaction because the oxidation state of the reactant and the product side are similar and they do not change their oxidation state.

Is H₂SO₄+NH₄Br a precipitation reaction

H₂SO₄+NH₄Br is not a precipitation reaction because ammonium bromide is easily soluble in water.

Is H₂SO₄+NH₄Br a reversible or irreversible reaction

H₂SO₄+NH₄Br is an irreversible reaction because there are possibilities to the formation of other compounds.

Is H₂SO₄+NH₄Br displacement reaction

H₂SO₄+NH₄Br is a double displacement reaction in which cations and anions are formed because in the reaction NH₄ ions are displaced by the H⁺ ions and the SO₄ ions are displaced by the Br ions.

Conclusion

Ammonium bromide is easily dissolved in water, odorless and it is present in yellowish color crystals when it comes to the atmosphere. It is a salt of volatile acid and also able to give acid-base type reactions. This compound is used in pharmaceutical industries, wooden industries, textile, etc.