Aluminium chloride is an essential compound that comprises aluminium and chlorine. Aluminium is an integral member of the boron family in the periodic table, appearing like silver with a lower weight. The chemical representation of aluminium chloride is ‘Al’, and its atomic number is 13. When aluminium comes directly in contact with air, an oxygen layer forms on its surface, as it has a higher affinity for oxygen. Aluminium’s density is slightly lower than that of steel. Chloride is a toxic gaseous substance with corrosive and irritable properties. When exposed to air, it can cause severe eye irritation and other reactions. Chloride is a member of the halogen family and is the second lightest element.

Formation of aluminium chloride

Aluminium chloride reactions with other elements relate to their properties as both elements are from different groups of periodic tables and have opposite properties. The formation of aluminium chloride is through an exothermic reaction between the metal, aluminium, and the gas, chloride. Physically, aluminium chloride is a silver white powder element that sometimes appears pale yellowish due to the presence of ferric chloride as the toxic element. The chemical formula of Aluminium Chloride is AlCl3, and it is also known as aluminium trichloride as it contains three elements of chloride with a single element of aluminium. Aluminium chloride has a high solubility ratio and is completely soluble in water, hydrogen chloride (HCl), chloroform and ethanol and partially soluble in benzene.

Aluminium Chloride reactions

Aluminium chloride reacts differently with various elements. It attains low melting and boiling points as a solid compound and forms a covalent bond because of opposite properties. Aluminium chloride is a bad conductor of electricity in the solid state and attains the sublime state at approximately 178 degrees of temperature. Below are the reactions of aluminium chloride with different elements:

• The reaction of Aluminium Chloride with water: Aluminium Chloride in an anhydrous state has an affinity with water. When there is the air’s moisture content, the aluminium chloride fumes out but mixes with the liquid appropriately. The Cl3 elements are replaced with H2O elements and form the hexahydrate element. After this, the anhydrous state is lost and cannot be attained. Below is the chemical representation:

Al(H2O)6Cl3 → Al(OH)3 + 3 HCl + 3 H2O

In case of high heat of hydration, the aluminium chloride can explode when in contact with water. In a hydrolysed state, aqueous state and in contact with hydrochloric acid (HCl), it gains ionised properties and acts as a good conductor of electricity.

Properties of aluminium chloride

Aluminium chloride’s property is its association with various types of elements and compounds. The aluminium chloride reacts with several other elements resulting in changes to its physical and chemical properties. It occurs because of the chemical composition and reaction within a specific medium. The element’s state (i.e., solid, liquid or gaseous state) also impacts aluminium chloride’s physical and chemical properties. Below mentioned are some physical and chemical properties of aluminium chloride:

Physical properties of aluminium chloride

• In the molten state, aluminium chloride is the bad conductor of electricity.
• When aluminium chloride attains liquid state when the pressure reaches above 2.5 atm and temperature rises above 190 degrees Celsius.
• The melting point and boiling point of aluminium chloride are shallow.
• The appearance of the aluminium chloride is white, but with the presence of toxic contaminants like Iron trichloride, it appears pale yellow.

Chemical properties of Aluminium Chloride

• Aluminium chloride is a highly corrosive substance due to its toxic properties of chloride.
• It acts as the Lewis gas, making it an ideal industrial catalyst.
• It attains non-flammable and non-explosive properties in any state.
• Aluminium chloride reacts violently with specific bases and water.
• In the form of an aqueous solution, aluminium chloride behaves as other aluminium salts.

Applications of aluminium chloride

Aluminium chloride has several general and industrial uses owing to its non-flammable and non-explosive properties. It is highly compatible with numerous elements, making it ideal for a wide array of uses. Below are some common practical uses of aluminium chloride:

• It is used as a pesticide and in pharmaceuticals.
• It is used to produce Ethylbenzene and in polymerisation and isomerisation with different types of hydrocarbons.
• The aromatic series is attached to the aldehyde group with the help of aluminium chloride.
• It is widely used in manufacturing rubber, paints, lubricants, petrochemicals and wooden preservatives.
• Aluminium chloride acts as the flux medium while melting aluminium.

Conclusion

So, here are some crucial aspects associated with the aluminium chloride and its reactions within different states and mediums. It reacts differently with different states of water (i.e., solid, liquid and gas).

Aluminium Chloride is the compound formed from three elements of chloride and one element of aluminium. As chloride is toxic, aluminium chloride turns highly toxic sometimes. It attains the liquid state at a very high temperature and is mainly used in the petrochemical and pharmaceutical industry.