Oxidation number Type of compounds Examples Normal oxides, oxyacids, oxysalts Na2O, Cao, H2O Peroxides Na2O2, BaO, H2O2 -1/2 Hyperoxide KO 1/3 Ozonides KO For the following oxides, determine the type PbO2, BaO,, SnO,, Na2O, KO,, Na2O2 The properties of peroxides and hyperoxide 1. React with water or acid Na,O 2H,o=2NaoH +H,O Na2O2+H2SO4= Na2 SO4+ H2O 2KO2+2H20=2KOH H2O2+O2t 2KO2+H2so4=K2SO4+ H2O2+ O2t 2. React with carbon dioxide 2Na202+ 2CO2=2Na2CO3 +O21 2BaO2+ 2CO2=2BaCO3+ O2t 4KO2+ 2CO2=2K2CO3 3021 Section Two Oxygen, and hydrogen peroxide 1. Ozone: O3 1) Formation: bond 2) Structure 2. H2O2(hydrogen peroxide 1)Structure 2)Properties SPure hydrogen peroxide is a colorless liquid hydrogen peroxide molecules will associate if they exist in liquid state or solid state because of hydrogen bonds; hydrogen peroxide can dissolve in water in any proportion 第13页 2006-02-22第 13 页 2006-02-22 13 Oxidation number Type of compounds Examples -2 Normal oxides, oxyacids, oxysalts Na2O, CaO, H2O -1 Peroxides Na2O2, BaO2, H2O2 -1/2 Hyperoxides KO2 -1/3 Ozonides KO3 0 O2, O3 For the following oxides, determine the type: PbO2, BaO2, SnO2, Na2O, KO2, Na2O2 The properties of peroxides and hyperoxides: 1. React with water or acid: Na2O2 + 2H2O = 2NaOH + H2O2 Na2O2 + H2SO4 = Na2SO4 + H2O2 2KO2 + 2H2O = 2KOH + H2O2 + O2↑ 2KO2 + H2SO4 = K2SO4 + H2O2 + O2↑ 2. React with carbon dioxide 2Na2O2 + 2CO2 = 2Na2CO3 + O2↑ 2BaO2 + 2CO2 = 2BaCO3 + O2↑ 4KO2 + 2CO2 = 2K2CO3 + 3O2↑ Section Two Oxygen, and hydrogen peroxide 1. Ozone :O3 1) Formation: bond 2) Structure 2. H2O2 (hydrogen peroxide): 1) Structure 2) Properties ○ 1Pure hydrogen peroxide is a colorless liquid; hydrogen peroxide molecules will associate if they exist in liquid state or solid state because of hydrogen bonds; hydrogen peroxide can dissolve in water in any proportion