POTASSIUM OXIDE K2OProperties 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). |
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Chemical formulas tell the ratio of elements as they are combined with each other.