SODIUM PEROXIDE Na2O2

Properties of Sodium peroxide Na2O2:

White (sometimes yellow because of the impurities NaO2). When heated in air turn yellow and decomposes, melts at a pressure of O2. Has an ionic structure of the (Na+)2(O2-2). Absorbs CO2 from the air. Completely decomposed by water, acids. Reacts vigorously with oxygen, sulfur, sodium, mono and carbon dioxide. Exhibits redox properties.


Obtaining sodium peroxide Na2O2:

2Na + O2 (air) = Na2O2 (burning, impurity Na2O)

2Na + O2 = Na2O2 (250-400°C).

2Na2O = Na2O2 + 2Na (t > 700°C).

2Na2O + O2 = 2Na2O2 (250-350°C, pressure).

2NaOH + 2H2O + 3H2O2 (conc.) = Na2O2-2H2O2-4H2O↓ (0°C)

Na2O2-2H2O2-4H2O = Na2O2 + 2H2O2 + 4H2O (normal temp., over conc. H2SO4).


Reactions with sodium peroxide Na2O2:

2Na2O2 = 2 Na2O + O2 (400-675°C, vacuum).

Na2O2 + 8H2O(moisture) = Na2O2 - 8H2O (0° С).

Na2O2 + 2H2O(cold) = H2O2 + 2NaOH

2Na2O2 + 2H2O(hot) = O2↑ + 4NaOH.

Na2O2 + 2HCl(diluted, cold) = 2NaCl + H2O2.

2Na2O2 + 2H2SO4 (diluted, hot) = 2Na2SO4 + 2H2O + O2↑.

Na2O2 + O2 = 2NaO2 (450-500°C, pressure).

2Na2O2 + S = Na2SO3 + Na2O (100° C)

2Na2O2 + С(graphite) = Na2CO3 + Na2O (100°C)

3Na2O2 + 2Al (powder) = 2NaAlO2 + 2Na2O (70-120°C).

2Na2O2 + 2 CO2 = 2Na2CO3 + O2

Na2O2 + CO = Na2CO3 (normal temp.).

Na2O2 + MnO2 = Na2MnO4 (400-500°C).

Na2O2 + 2Na = 2Na2O (130-200°C, in the atmosphere of Ar).

5Na2O2 + 8H2SO4(diluted) + 2KMnO4 = 5O2↑ + 2MnSO4 + 8H2O + 5Na2SO4 + K2SO4.

Na2O2 + 2H2SO4(diluted) + 2NaI = I2↓ + 2Na2SO4 + 2H2O.

3Na2O2 + 2Na3[Cr(OH)6] (hot) = 2 Na2CrO4 + 8NaOH + 2H2O.

Na2O2 + 2H2SO4 (diluted) + 2FeSO4 = Fe2(SO4)3 + Na2SO4 + 2H2O

Na2O2 + 2Fe(ОН)2(suspension) = 2FeO(OH)↓ + 2NaOH.


 

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