Skip to content
Related Articles

Related Articles

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

View Discussion
Improve Article
Save Article
Like Article
  • Last Updated : 01 May, 2022

Magnesium Iodide equation additionally alluded to as Diiodomagnesium recipe, is the name for the substance compounds with the equation Mgl2 and its different hydrates Mgl2x. This substance compound has different hydrates which are regular ionic halides, and which don’t break up in the water. The substance compound is for the most part utilized inside medication, aside from this, it additionally has some use in the planning of mixtures for natural combination. In addition, diiodomagnesium is a glasslike strong white in tone and has no smell. It very well may be incorporated by utilizing magnesium oxide, magnesium carbonate, and magnesium hydroxide and treating them with hydroiodic corrosive.

The magnesium iodide equation is likewise alluded to as diiodomagnesium recipe. An inorganic salt can be effortlessly found in seawater. This compound has different hydrates which are normal ionic halides and is for the most part insoluble in water.
Diiodomagnesium is a translucent strong compound that is white in tone and unscented. It tends to be orchestrated or made by utilizing magnesium oxide, magnesium carbonate, and magnesium hydroxide and treating them with hydroiodic corrosive.

Magnesium Iodide Formula 

The synthetic and atomic equation of Magnesium Iodide is MgI2. Moreover, it exists in different structures like MgI2 (anhydrous), and MgI2. 6H2O (hexahydrate), MgI2..8 H2O (octahydrate). The molar mass of the given structure is:

  1. Anhydrous Magnesium iodide = 278.1139 g/mol
  2. Hexahydrate Magnesium iodide = 386.2005 g/mol
  3. Octahydrate Magnesium iodide = 422.236 g/mol.

Magnesium Iodide Structure

Primarily, the Magnesium cation i.e., Mg2+ responds with the Iodine anion i.e., I2+. It exists in hexagonal precious stone design for the anhydrous structure, monoclinic construction for hexahydrate structure, and an orthorhombic structure for octahydrate structure.


Occurrence of Magnesium Iodide

As prior referenced, in nature, it happens in ocean salt and is a typical inorganic salt. By and large, it is promptly accessible in many volumes, sub-micron, nano-powder, and high virtue. Researchers set them up in the labs.

Preparation of Magnesium Iodide

Magnesium iodide can be ready from Magnesium oxide and magnesium carbonate with the treatment by hydroiodic corrosive. The response can be addressed as,

MgO + HI → MgI2 + H2O

MgCO3 + 2HI → MgI2 + CO2 + H2O

Reactions of Magnesium Iodide

It is steady under the high hotness under the hydrogen environment. Yet, at the typical temperature or we can say at room temperature, it breaks down in the air by becoming brown from the arrival of basic iodine. In addition, assuming that we heat magnesium iodide in the air, it totally disintegrates off.

An elective technique for the readiness of Magnesium iodide (MgI2) is by blending the powdered natural iodine with the magnesium metal to get anhydrous Magnesium Iodide however the condition from the response is that it ought to be directed in the anhydrous air for which diethyl ether is a dissolvable can be utilized.

Physical Properties of Magnesium

  • Magnesium has a brilliant white appearance.
  • Among every one of the underlying metals, magnesium is the lightest.
  • It is 1090°C or 1994°F to the bubble point.
  • The metal shows an excellent conductivity of hotness and power.

Chemical Properties of Magnesium

  • Magnesium is situated among the basic earth metals on the intermittent table. This component has a place with gathering 2 and period 3 of the intermittent table.
  • It has the nuclear number 12 which infers that it has 12 protons and 12 electrons. The normal nuclear mass of this component is 24.305 amu.

Reactivity of Magnesium

  • Magnesium is an exceptionally receptive metal and doesn’t exist in a free state in nature.
  • It responds at a sluggish speed with cold water and at an exceptionally quick speed with boiling water.
  • It responds with practically every one of the acids and alkalies, prompting the development of a wide range of mixtures and results.
  • It effectively responds to numerous non-metals like nitrogen and fluorine.
  • Magnesium likewise promptly responds to certain different mixtures like carbon monoxide, carbon dioxide, sulfur dioxide,

Oxidization of Magnesium

  • The oxidation cycle of magnesium is exceptionally quick and a layer of oxidized magnesium is framed on the outer layer of the metal, whenever kept in the open.
  • Magnesium is additionally consumed quickly when it is at room temperature. This consuming system is exceptionally irate as it creates a blinding white light.

Uses of Magnesium Iodide 

It is by and large utilized in interior meds. Additionally, it discovers a few businesses utilize as we can utilize it to plan compounds for natural amalgamation.

Sample Questions

Question 1: Make sense of the technique for the arrangement of Magnesium Iodide? 


Magnesium Iodide (MgI2) can be ready by the responses of magnesium hydroxide with the hydroiodic corrosive:

Mg(OH)­2+ 2HI → MgI2 + 2H2O

Whenever Magnesium hydroxide responds with the hydroiodic corrosive it will bring about the development of Magnesium iodide and water.

Question 2: Give the well-being peril related to the Magnesium Iodide. 


While interacting with the eyes and skin it brings about the disturbance. Likewise, it can likewise prompt aggravation assuming that it is ingested or breathed in. The substance is poisonous to the thyroid as it has iodine in it. Rehashed and drawn out openness to the MgI2 can make genuinely harm the organs. Its ingestion can cause regurgitating as well as breathing issues. Also, its long openness to the eyes might actually cause visual impairment.

Question 3: Compose the response of Magnesium oxide and Magnesium carbonate when treated with hydroiodic corrosive? 


The response between Magnesium oxide and magnesium carbonate with the treatment by hydroiodic corrosive can yield Magnesium Iodide. The response can be addressed as:

MgO + HI → MgI2 + H2O

MgCO3 + 2HI → MgI2+ CO2 +H2O

Here, MgO = Magnesium oxide

MgCO3 ­= Magnesium carbonate

Howdy = Hydroiodic corrosive

CO2 = carbon dioxide

H2O = water.

Question 4: Expound on the purposes of Magnesium iodide? 


  • It is by and large utilized in inner drugs.
  • It discovers a few business utilizes as we can utilize it to plan compounds for natural combinations. 
  • It is additionally utilized as a reagent and intermediates in drugs.

Question 5: Magnesium(s) + Iodine(g) → Magnesium Iodide(s), Write balanced chemical equations and identify the type of reaction.


The equation is as follows,

2Mg + I2 ⇢ 2MgI

Hence, it is a combination reaction

Question 6: Give the properties of Magnesium iodide. 


Atomic weight:

  • Anhydrous Magnesium iodide = 278.1139 g/mol
  • Hexahydrate Magnesium iodide = 386.2005 g/mol
  • Octahydrate Magnesium iodide = 422.236 g/mol.


  • 4.43 g/cm3 (anhydrous)
  • 2.353 g/cm3 (hexahydrate)
  • 2.098 g/cm3 (octahydrate)

Shows up as,

  • Glasslike strong and white in variety
  • Liquefying point – 637°C

Question 7: Expound on the solvency of Magnesium iodide.


Its dissolvability in different dissolvable are given beneath:

  1. Liquor-solvent
  2. Smelling salts-solvent
  3. Ether-solvent
  4. Water-Exceptionally dissolvable

My Personal Notes arrow_drop_up
Recommended Articles
Page :

Start Your Coding Journey Now!