POTASSIUM HYDRIDE KHProperties potassium hydride KH: White. Decomposes when heated, pressurized H2 melts without decomposition. A strong reducing agent, reacts with water, acids, ammonia, oxygen, chlorine. Obtaining potassium hydride KH: 2 K + H2 = 2 KH (200-350° C). Chemical reactions with potassium hydride KH: 2 KH = 2 K + H2 (400° C, vacuum). KH + H2O = KOH + H2 ↑. KH + HCl (diluted) = KCl + H2 ↑. 2 KH + O2 = 2 KOH (t> 200° C). KH + Cl2 = KCl + HCl (400-450° C). KH + CO2 = KHCOO [t<150° C, pressure]. 4 KH + 3 SiO2 = 2 K2SiO2 + Si + 2 H2 (500° C). KH + NH3 (gas) = KNH2 + H2 (300° C). |
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Most of the air is about 78% nitrogen gas. Only 21% consists of oxygen. The remaining 1% consists of carbon dioxide, argon, neon, helium, krypton, hydrogen, xenon and ozone.