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

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  • Last Updated : 03 May, 2022
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Ammonium iodide is an inorganic chemical compound that appears in the form of white crystalline powder. The chemical formula of Ammonium iodide is NH4I. Most commonly used in photographic chemicals and medicines and used in copper-mediated selective cyanation reaction of Indoles and 2-Phenylpiridines and it is harmful to the person who inhales causes irritation. Ammonium iodide contains Nitrogen, Hydrogen, and Iodine atoms. Nitrogen bonded with Hydrogens and one of the Hydrogen shares its electrons with Iodine. Ammonium iodide was discovered in the form of perchlorate. It is also called Azanium iodide.

Ammonium Iodide

Ammonium iodide is a chemical compound that contains 1 Nitrogen atom, 4 Hydrogen atoms, and 1 Iodine atom. The chemical formula of Ammonium iodide is NH4I. The Ammonium iodide is prepared by reacting Ammonia or Ammonium Hydroxide with Hydroiodic acid or Hydrogen iodide. Ammonium iodide is easily soluble in water and Ethanol. In the presence of moist air, the Ammonium iodide will decompose and turns into yellow crystals with the release of iodine. Ammonium iodide is used in photographic chemicals and some medications.

Ammonium Iodide Formula

The chemical formula for ammonium iodide is NH4I. Other names are Azanium iodide, Iodide salt of Ammonia.

Structure of ammonium iodide

Ammonium iodide contains 1 Nitrogen atom, 4 Hydrogen atoms, and 1 Iodine atom. The chemical formula of Ammonium iodide is NH4I. Ammonium iodide is prepared by reacting Ammonia or Ammonium Hydroxide with Hydrogen iodide or Hydroiodic acid.

 

Physical Properties of Ammonium Iodide

  • Ammonium iodide is a white crystalline powder.
  • The density of Ammonium iodide is 2.51 g/cm3.
  • The Melting point of Ammonium iodide is 551°C (or) 1024°F.
  • The Boiling point of Ammonium iodide is 235°C (or) 455°F.
  • Ammonium iodide is easily soluble in water & Ethanol.
  • The Molar mass of Ammonium iodide is 144.94 g/mol.

Chemical Properties of Ammonium Iodide

  • Ammonium Iodide treats with Silver oxide in presence of water and forms Ammonium hydroxide and Silver iodide.

 

  • Ammonium iodide undergoes dissociation and forms Ammonia and Hydrogen iodide.

 

Preparation of Ammonium Iodide

  • Ammonium iodide is prepared by reacting Ammonia or Ammonium hydroxide with Hydroiodic acid or Hydrogen iodide.

NH3 + HI ⇢ NH4I

NH4OH + HI ⇢ NH4I + H2O
 

Uses of Ammonium Iodide

  • Ammonium iodide is used in Photographic chemicals.
  • Ammonium iodide is used in some medications.
  • Ammonium iodide is used in copper-mediated selective cyanation reaction of Indoles and 2-Phenylpiridines.
  • Ammonium iodide is used along with hydrogen peroxide in eco-friendly oxy iodination of aromatic compounds.
  • Ammonium iodide is used as a reagent in Laboratories.
  • Ammonium iodide is used in the treatment of Thyroid disease.
  • Ammonium iodide is used in the manufacturing of fire extinguishers, Explosives, and color dyes.

Sample Questions

Question 1: Is Ammonium iodide dangerous?

Ammonium iodide causes several health issues to a person who inhales, majorly it causes irritation of the nose and throat. High exposure to Ammonium iodide without precautions causes Eye and skin irritation. The toxic and irritating fumes from the iodine results in the fire explosion. The Ammonium iodide can be stored in a well-closed container with a tight lid and kept away from sunlight.

Question 2: How do you make Ammonium iodide?

Answer:

  • Ammonium iodide is prepared by reacting Ammonia or Ammonium hydroxide with Hydroiodic acid or Hydrogen iodide.

NH3 + HI ⇢ NH4I

NH4OH + HI ⇢ NH4I + H2O

  • Ammonium iodide is prepared by using potassium iodide and ammonium sulfate.

Question 3: Is Ammonium iodide acidic or basic in water?

Answer:

Ammonium iodide is an ionic compound consisting of one Ammonium and one Iodine ion. Ammonium iodide is acid when it dissolves in water because some of the Ammonium ions will react with the water to form Ammonia and Hydronium.

Question 4: What type of compound is Ammonium Iodide?

Answer:

Ammonium iodide is a chemical compound that has 1 Nitrogen, 4 Hydrogen, and 1 Iodine atom and the chemical formula is NH4I. The ammonium iodide appears as a white crystalline powder and is easily soluble in Water and Ethanol. Ammonium iodide forms Cubes when it dissolves in water. Ammonium iodide is an ionic compound.

Question 5: Is Ammonium iodide Covalent or ionic?

Answer:

Ammonium iodide is an ionic compound. The Ammonium iodide consists of 1 Ammonium and 1 Iodine ion. Both ammonium and Iodine ions have a charge.

Question 6: Write some uses of Ammonium iodide.

Answer:

Ammonium iodide is commonly used in photographic chemicals and medications or medicines. The Ammonium iodide is also used in copper-mediated selective cyanation reaction of Indoles and 2-Phenylpiridines and used along with hydrogen peroxide in ecofriendly oxy iodination of aromatic compounds and is rarely used as a reagent in Laboratories. 

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