SODIUM HYDRIDE NaHProperties of Sodium hydride NaH: White. Decomposes when heated, under hydrogen pressure melts without decomposition. A strong reducing agent, reacts with water, acids, ammonia and oxygen. Obtaining Sodium hydride: 2Na + H2 = 2 NaH (250-400°C, pressure). 2Na2[ReH9] = 4 NaH + 2 Re + 7H2 (245°C). Reactions with Sodium hydride: 2NaH = 2Na + H2 (430-500°C, vacuum). NaH + H2O = NaOH + H2↑. NaH + HCl (diluted) = NaCl + H2↑. 2NaH + O2 = 2 NaOH (t>230°C). NaH + Cl2 = NaCl + НСl (450-500°C) 2NaH + 2 S = Na2S + H2S (350-400°C). 2NaH + 4C (graphite) = Na2C2 + C2H2 (350°C). NaH + CO2 = Na(HCOO) (until 200°C, pressure). 2NaH + 2 SO2 = Na2SO4 + H2S (200-250°C). 4NaH + AlCl3= Na[AlH4] + 3NaCl (in ether). 2NaH + (FeIIFe2III)O4 = 4NaOH + 3Fe (350-420°C). 2NaH + TiCl4 = Ti + 2NaCl + 2HCl. NaH + NH3 (gas) = NaNH2 + H2 (350°C). |
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Elements in horizontal rows are called periods.