potassium sulphate definition, potassium sulphate meaning | English dictionary

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potassium sulphate

  

      n   a soluble substance usually obtained as colourless crystals of the decahydrate: used in making glass and as a fertilizer. Formula: K2SO4  
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potassium  
      n   a light silvery element of the alkali metal group that is highly reactive and rapidly oxidizes in air; occurs principally in carnallite and sylvite. It is used when alloyed with sodium as a cooling medium in nuclear reactors and its compounds are widely used, esp. in fertilizers. Symbol: K; atomic no.: 19; atomic wt.: 39.0983; valency: 1; relative density: 0.862; melting pt.: 63.71°C; boiling pt.: 759°C  
     (C19: New Latin potassa potash)  
  potassic      adj  


antimony potassium tartrate  
      n   a colourless odourless poisonous crystalline salt used as a mordant for textiles and leather, as an insecticide, and as an anthelmintic. Formula: K(SbO)C4H4O6,   (Also called)    tartar emetic  
potassium-argon dating  
      n   a technique for determining the age of minerals based on the occurrence in natural potassium of a small fixed amount of radioisotope 40K that decays to the stable argon isotope 40Ar with a half-life of 1.28x109 years. Measurement of the ratio of these isotopes thus gives the age of the mineral  
   Compare       radiocarbon dating       rubidium-strontium dating  
potassium bitartrate  
      n      another name (not in technical usage) for       potassium hydrogen tartrate  
potassium bromide  
      n   a white crystalline soluble substance with a bitter saline taste used in making photographic papers and plates and in medicine as a sedative. Formula: KBr  
potassium carbonate  
      n   a white odourless substance used in making glass and soft soap and as an alkaline cleansing agent. Formula: K2CO3  
potassium chlorate  
      n   a white crystalline soluble substance used in fireworks, matches, and explosives, and as a disinfectant and bleaching agent. Formula: KClO3  
potassium cyanide  
      n   a white poisonous granular soluble solid substance used in photography and in extracting gold from its ores. Formula: KCN  
potassium dichromate  
      n   an orange-red crystalline soluble solid substance that is a good oxidizing agent and is used in making chrome pigments and as a bleaching agent. Formula: K2Cr2O7  
potassium ferricyanide  
      n   a bright red soluble crystalline substance used in making dyes, pigments, and light-sensitive paper. Formula: K3Fe(CN)6,   (Also called)    red prussiate of potash  
potassium ferrocyanide  
      n   a yellow soluble crystalline compound used in case-hardening steel and making dyes and pigments. Formula: K4Fe(CN)6,   (Also called)    yellow prussiate of potash  
potassium hydrogen tartrate  
      n   a colourless or white soluble crystalline salt used in baking powders, soldering fluxes, and laxatives. Formula: KHC4H4O6,   (Also called (not in technical usage))    potassium bitartrate, cream of tartar  
potassium hydroxide  
      n   a white deliquescent alkaline solid used in the manufacture of soap, liquid shampoos, and detergents. Formula: KOH,   (Also called)    caustic potash      See also       lye  
potassium nitrate  
      n   a colourless or white crystalline compound used in gunpowders, pyrotechnics, fertilizers, and as a preservative for foods, esp. as a curing salt for ham, sausages, etc. (E252). Formula: KNO3,   (Also called)    saltpetre, nitre  
potassium permanganate  
      n   a dark purple poisonous odourless soluble crystalline solid, used as a bleach, disinfectant, and antiseptic. Formula: KMnO4,   (Systematic name)    potassium manganate(VII)  
potassium sulphate  
      n   a soluble substance usually obtained as colourless crystals of the decahydrate: used in making glass and as a fertilizer. Formula: K2SO4  

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