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OXIDES

OXIDES. Cazan Oana –IT Bătăneanţ Denisa - chimie Plotuna Ana Maria – lb. engleză. DEFINITION.

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OXIDES

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  1. OXIDES Cazan Oana –IT Bătăneanţ Denisa - chimie Plotuna Ana Maria – lb. engleză

  2. DEFINITION Oxides are composed of substances in which composition enter one or more atoms of oxygenor atoms with one or more nonmetal atoms.

  3. Examples of formulates of oxides: CaO P2o5 CO2 NO2 SO2 SiO2 Cu2O MgO CuO PbO

  4. THE NATURALE STATE The naturale state shows us where to find oxides in nature.

  5. The Carbon Dioxide-CO2 It found free into the atmosphere and into the carbonated waters.

  6. Aluminium Oxide- Al2O3 It is found in nature as crystalized.

  7. Arsenic trioxide - it is fond in the form of poison

  8. Silicon dioxide - SiO2 It is the mineral form of sand.

  9. Sulphur dioxide - SO2 It is found as a toxic gas

  10. Cerium Oxide It can be found as yellowish-white powder

  11. THE CLASSIFICATION Clasification by chimical nature of the item is: -nonnemetallic oxides- acids -metalic oxides- basics OF OXIDE

  12. Chimical properties General scheme for the reactions with water nonmetal oxide + H2O => salts metal oxide + H2O => baze nonmetal oxide+base => H2O + salts metal oxide + acid => H2O + salts -at low temperatures, forms oxides which react with each other and they form salts -the oxides don’t maintain the combustion

  13. Chimical equations: CaCO3 = CO2 + CaO CuCO3 = CO2 + CuO 2Ca + O2 = 2CaO C+ O2 = CO2 CO2 + H2O = H2CO3 CaO + H2O = Ca(OH )2NaOH + CO2 => Na2CO3 + H2O 2HNO3 + CaO => Ca(NO3)2 + H2O

  14. S + O2 = SO2

  15. SO2 + H2O = H2SO3

  16. Ca(OH)2 + CO2 = CaCO3 + H2O

  17. CaO + H2SO4 = CaSO4 + H2O

  18. PHYSICAL PROPERTIES State of matter: 1. SOLID – calcium oxide – CaO 2. LIQUID – sulfur dioxide - SO2 3. GAS – carbon dioxide – CO2 4. PLASMA-MAGNETITE – iron oxide or black iron oxide - Fe3O4 5. SOLID RADIOACTIVE-uranium -U

  19. Physical Properties Calcium oxide -solid -odorless -density 3,37 g x cm (Raise to the power of -3 Carbon dioxide -odorless -gas comprising 0.03% of the atmosphere Sulfur dioxide -pungent odor -gas -solubility 112g/l water Magnetite (iron oxide) -odorless -solid -magnetic Uranium ore -gas, solid -radioactive metal -toxic

  20. Oxid de calciu colour - white Carbon dioxide is colorless

  21. Sulfur dioxide is coloreless Magnetite (iron oxide) Colour:black

  22. Uranium ore Colour – depends where is used

  23. PbO (plumb oxid) - it is used in medicine and painting; • SiO2(sulf dioxide) – SAND- it is used in constructions; • Al2O3(sulfur trioxide) – ruby, sapphire (gemstones) , it is used for jewelry craf; • MnO2(manganese dioxide) – it is used in automotive • industry and the industry of the thermoelectric power station ; • SiO2(sulphur dioxide) – amethyst and rose quartz – it is used for jewerly craf; • CO2(carbon dioxide) – (the gaz form the water boottles) • it is used to process the carbonate mineral water , juice and to extract the beer form the barrels; it is also used to extinguishing fires; • CaO(calcium oxide) - it is used in constructions; USES

  24. USES: Magnesium oxide - MgO It is found most often in fertilizers but is also included in the refractory materials –for furnaces in the metallurgy industry.

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