POTASSIUM OXIDE K2O

Properties potassium oxide K2O:

White, heat-resistant. Shows the basic properties, reacts vigorously with water (formed highly alkaline solution), acids, acidic and amphoteric oxides, liquid ammonia.


Obtaining potassium oxide K2O:

2K + 2KOH = 2K2O + H2 (450°C).

KO2 (-O2) → (290° C, vacuum) K2O2 (-O2)→ (530°C) K2O.

KO2 + 3 K = 2K2O (700°C, pressure).

2KOH + 2 K = 2K2O + H2 (400-450°C).

K2CO3 = K2O + CO2 (t>1200°C).


Chemical reactions with potassium oxide K2O:

2K2O = K2O2 + 2K (350-430°C).

K2O + H2O = 2KOH.

K2O + 2HCl (diluted) = 2KCl + H2O.

K2O + CO2 = K2CO3 (400°C).

K2O + 2NO2 = KNO2 + KNO3 (150-200°C).

K2O + Al2O3 = 2KAlO2 (1000°C).

K2O + NH3 (liquid) → time → KNH2↓ + KOH (-50°C).
 

Did you know?

Ionic radius of metal are smaller than their atomic radius (lose electrons.)