POTASSIUM HYDRIDE KH

Properties 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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