![]() Many other potassium salts are of great importance, including the hydroxide (KOH), nitrate (KNO 3), carbonate (K 2CO 3), iodide, chloride (KCl), bromide (KBr), cyanide (KCN), chlorate (KClO 3) and sulfate (K 2SO 4).Īlloy of sodium & potassium (NaK) is used as a heat-transfer medium. The greatest demand for potassium compounds (potash) has been in its use for fertilizers. Naming: From potash (pot ash) & K symbol from latin: kalium (meaning alkali)ĭiscovery and first isolation: Humphry Davy (1807) in London, England Potassium Uses It reacts with hydrogen, and forming potassium hydride:Ģ K (s) + H 2 (g) → 2 KH (s) Potassium History ![]() The metal dissolves readily in dilute sulphuric acid, and forming potassium ions & hydrogen gas:Ģ K (s) + H 2SO 4 (aq) → 2 K + (aq) + SO 4 2- (aq) + H 2 (g) Reacts with Halogens, and forms potassium halides:Ģ K (s) + F 2 (g) → 2 KF (s) (potassium fluoride)Ģ K (s) + Cl 2 (g) → 2 KCl (s) (potassium chloride)Ģ K (s) + Br 2 (g) → 2 KBr (s) (potassium bromide)Ģ K (s) + I 2 (g) → 2 KI (s) (potassium iodide) Reacts violently with water, and forming a colourless solution of potassium hydroxide & hydrogen gas:Ģ K (s) + 2 H 2O (l) → 2 KOH (aq) + H 2 (g) ↑ It reacts slowly with air under normal condition, But when heated, it oxidizing to form potassium superoxide: Ionization energies: 1st: 418 kJ.mol 2nd: 3052 kJ/mol 3rd: 4420 kJ/molīody Centered Cubic (BCC) Reactivity of PotassiumĮlectron affinity: 48.4 kJ/mol Nuclear Properties of Potassium Sound Speed: 2000 m/s Atomic Properties of Potassium Molar magnetic susceptibility: 0.262×10 -9 m 3/mol Physical Properties of Potassiumĭensity: 0.862 g/cm 3 (In solid) 0.828 g/cm 3 (In Liquid at M.P) Mass magnetic susceptibility: 6.7×10 -9 m 3/kg Volume magnetic susceptibility: 0.00000574 ![]() Magnetic susceptibility (x mol): +20.8×10 -6 cm 3/mol Thermal conductivity: 102.5 W/(m∙K) Electrical properties of PotassiumĪ Electrical type: Conductor Magnetic Properties of Potassium Potassium Electron Configuration Thermal Properties of Potassium ![]()
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