Ammonium Bromide Formula – Structure, Properties, Uses, Sample Questions

Last Updated : 20 Dec, 2023

Ammonium Bromide is an ionic compound with the chemical formula NH₄Br. It is formed from the atoms of different elements combined in a specific ratio. Ammonium is an ionic compound consisting of nitrogen and hydrogen. Nitrogen is a chemical element with the symbol N. Its atomic number is 7 and its electron configuration is 1s² 2s² 2p³. hydrogen is a chemical element with the symbol H. Its atomic number is 1 and Its electron configuration is 1s¹. Bromine is the chemical element with the symbol Br.It’s atomic number is 35 and it’s electron configuration is [Ar] 4s² 3d¹⁰ 4p⁵.

Ammonium Bromide formula

Ammonium Bromide is the ammonium salt of hydrobromic acid. It is an odorless white crystal. It is soluble in water. On exposure to air, it becomes to yellow color because of the oxidation of traces of bromide to bromine. To write the formula of ammonium bromide. Ammonium is not an element it is the group of elements bonded together to form an atomic ion it has a 1+ charge NH₄⁺. Bromine is a chemical element with the symbol Br. It has a negative charge then both are attracted to form the ionic compound NH₄Br.

It can be prepared by the reaction of Hydrogen Bromide on ammonia,

NH₃ + HBr ⇢ NH₄Br

Structure of Ammonium Bromide

Ammonium Bromide is the ionic compound NH₄⁺Br^–. In this structure nitrogen is the central atom bonding with four hydrogen atoms. Nitrogen is the chemical element with the symbol Ni its atomic number is 7 and its electron configuration is 1s² 2s² 2p³. It has 5 valance electrons. Hydrogen is the chemical element with the symbol H. Here we have 4 hydrogen atoms so totally we have nine valance electrons but ammonium is an ionic compound it has a positive charge which means losing one valance electron and then sharing with bromine so we have eight valance electrons. Bromine has seven valance electrons but in this ionic compound, Br has a negative charge which means got one electron.

Physical Properties Of Ammonium Bromide

Ammonium Bromide’s molecular weight is 97.94 g/mol.
Its density is 2.429 g/cm³
Its melting point is 235°C.
Its boiling point is 452°C.

Chemical Properties Of Ammonium Bromide

The chemical formula of Ammonium Bromide is NH₄Br.
It is a weak acid.
It is a strong electrolyte.
It decomposes to ammonia and hydrogen bromide when heated,

NH₄Br ⇢ NH₄ + HBr

Uses Of Ammonium Bromide

Ammonium Bromide is used in photography.
It is used as a corrosive inhibitor.
It is used in pharmaceutical preparations.
It is used in fireproofing wood.
It is used in lithography and process engraving.

Sample Questions

Question 1: Can bromine conduct electricity?

Answer:

Bromine is a very poor conductor of electricity. Nonmetals are a bad conductor of electricity. It is relatively uncharged as its electrons are tightly bound toward its nucleus. Therefore it does not have the mobile electrons to conduct electricity.

Question 2: Is Ammonium Bromide crystalline or amorphous?

Answer:

Ammonium Bromide is the ammonium salt of hydrobromic acid. It is composed of ammonium and bromide ions in a 1:1 ratio. The chemical crystallizes in colorless prisms, processing a saline taste.

Question 3: What type of intermolecular forces is Ammonium Bromide?

Answer:

Ammonium Bromide is the ammonium salt of hydrobromic acid. It is a strong electrolyte when it is present in the water. It’s decomposed to the ammonia and hydrogen bromide when it gets heated at raised temperature levels.

Question 4: What are the uses of ammonia?

Answer:

Ammonia is used as a fertilizer in agriculture. It is also used in wastewater treatment, rubber, paper, leather industries and also used in the production of printing as well as cosmetic industries.

Question 5: Is Ammonium Bromide dissolved in ethanol?

Answer:

Ammonium Bromide is a weak acid. It is freely soluble in the methanol, ethanol, and acetone, slightly soluble in ether, and insoluble in the ethyl acetate.

Question 6: Is ammonia acidic or base?

Answer:

Ammonia is a weak base because its nitrogen atom has an electron pair that easily accepts a proton but it reacts with water to produce ammonium ions and hydroxide ions.

Question 7: What are the uses of bromine?

Answer:

Bromine has a large variety of uses such as agricultural chemicals, dyestuffs, insecticides, pharmaceuticals, and chemical intermediates. Its compounds are effective pesticides used both as soil fumigants in agriculture, particularly fruit growing, and as a fumigant to prevent pets from attacking stored grain and other produce.