Potassium Hydroxide, Formula, Preparation Method, Chemical Properties

Potassium Hydroxide

Potassium hydroxide is an inorganic compound that has used for well numerous potassium chemicals. It looks like a white solid and dangerous corrosive. It is basically occurs in base nature. It has a hygroscopic pellets and strong oxidizing agent. Potassium hydroxide contains high stability power. It is the form of series of crystalline hydrates. The systematic IUPAC name is known as potassium hydroxide. The chemical or molecular formula of potassium hydroxide is KOH. It is commonly called as caustic potash.

Structural Formula

This is the structural formula of the potassium hydroxide:

Potassium Hydroxide

Chemical Formula

The chemical formula of the potassium hydroxide is KOH.

Preparation Method

When the potassium chloride is reacted with the water it gives the result of potassium hydroxide. The chloride and hydrogen gas is the byproduct. By the precipitation process it should be remained gas products until its evaporation. Then it separates the anodic and cathodic in the electrolysis cells. They participate in the acid-base equilibrium. It is used to displace halides and other leaving groups.

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2KCl + 2H2O → 2KOH + Cl2 + H2

Physical Properties

Melting point 360C
Boiling point 1327C
Molecular weight 56.11g/mol
Density 2.12g/cm3
Solubility in water 162.9g/100mL(100C)
Acidity 14.7
Crystal structure Rhombohedral
Appearance White solid deliquescent
Magnetic susceptibility -22.0 x 10-6 cm3/mol
Solubility Soluble in alcohol, insoluble in ether and liquid ammonia


Chemical Properties

The potassium hydroxide is a rhombohedral in structure. It has high volatile point and non inflammable substances. At room temperature it could be the range of orientation group such as 2.6 to 3.15 in the distorted. In the exothermic process it dissolves water quickly.


It is used to manufacture of soft soaps and liquids detergents. In alkaline batteries it acts as a electrolyte. For example nickel iron batteries is used the potassium hydroxide. In food industry it used to the creating foods thickener. It also used to disinfect surfaces and resist the corrosion materials.



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