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Water-reactive substances [1] are those that spontaneously undergo a chemical reaction with water, often noted as generating flammable gas. [2] Some are highly reducing in nature. [ 3 ] Notable examples include alkali metals , lithium through caesium , and alkaline earth metals , magnesium through barium .
It is a purplish-black crystalline salt, which dissolves in water as K + and MnO − 4 ions to give an intensely pink to purple solution. Potassium permanganate is widely used in the chemical industry and laboratories as a strong oxidizing agent, and also as a medication for dermatitis, for cleaning wounds, and general disinfection.
Potassium permanganate is an oxidizing agent. [5] The British National Formulary recommends that each 100 mg be dissolved in a liter of water before use. [3] Potassium permanganate was first made in the 1600s and came into common medical use at least as early as the 1800s. [6] It is on the World Health Organization's List of Essential Medicines ...
Potassium cyanide is a compound with the formula KCN. It is a colorless salt, similar in appearance to sugar , that is highly soluble in water. Most KCN is used in gold mining , organic synthesis , and electroplating .
Potassium hexacyanidoferrate(II) can be used as a fertilizer for plants. [citation needed] Prior to 1900, before the invention of the Castner process, potassium hexacyanidoferrate(II) was the most important source of alkali metal cyanides. [6] In this historical process, potassium cyanide was produced by decomposing potassium hexacyanidoferrate ...
Potassium superoxide is a source of superoxide, which is an oxidant and a nucleophile, depending on its reaction partner. [8] Upon contact with water, it undergoes disproportionation to potassium hydroxide, oxygen, and hydrogen peroxide: 4 KO 2 + 2 H 2 O → 4 KOH + 3 O 2 2 KO 2 + 2 H 2 O → 2 KOH + H 2 O 2 + O 2 [9] It reacts with carbon ...
Potassium sulfate (US) or potassium sulphate (UK), also called sulphate of potash (SOP), arcanite, or archaically potash of sulfur, is the inorganic compound with formula K 2 SO 4, a white water-soluble solid. It is commonly used in fertilizers, providing both potassium and sulfur.
Potassium metabisulfite, K 2 S 2 O 5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent odour. It is mainly used as an antioxidant or chemical sterilant . [ 1 ] As a disulfite , it is chemically very similar to sodium metabisulfite , with which it is sometimes used interchangeably.
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