oxides
DESCRIPTION
OXIDES. Cazan Oana –IT Bătăneanţ Denisa - chimie Plotuna Ana Maria – lb. engleză. DEFINITION. - PowerPoint PPT PresentationTRANSCRIPT
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OXIDES
Cazan Oana –IT Bătăneanţ Denisa - chimie Plotuna Ana Maria – lb. engleză
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DEFINITION
Oxides are composed of substances in which composition enter one or more atoms of oxygen or atoms with one or more nonmetal atoms.
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Examples of formulates of oxides:
1. CaO2. P2o5
3. CO2
4. NO2
5. SO2
6. SiO2
7. Cu2O8. MgO9. CuO10.PbO
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The naturale state shows us where to find oxides in nature.
STATE
THE NATURALE
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The Carbon Dioxide-CO2
It found free into the atmosphere andinto the carbonated waters.
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Aluminium Oxide-It is found in nature as crystalized.
Al2O3
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Arsenic trioxide - it is fond in the form of poison
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Silicon dioxide - It is the mineral form of sand.
SiO2
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Sulphur dioxide -SO2
It is found as a toxic gas
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CERIUM OXIDE
It can be found as yellowish-white
powder
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THE CLASSIFICATION
OF OXIDE
Clasification by chimical nature of the item is: -nonnemetallic oxides- acids -metalic oxides- basics
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ACIDES BASICCO2 CaO
SO2 Al2O3
SO3 Fe2O3
NO2 CuO
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General scheme for the reactions with
waternonmetal oxide + H2O => saltsmetal oxide + H2O => bazenonmetal oxide+base => H2O + saltsmetal 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
Chimical properties
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Chimical equations:CaCO3 = CO2 + CaO CuCO3 = CO2 + CuO2Ca + O2 = 2CaOC+ O2 = CO2
CO2 + H2O = H2CO3
CaO + H2O = Ca(OH )2
NaOH + CO2 => Na2CO3 + H2O
2HNO3 + CaO => Ca(NO3)2 + H2O
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S + O2 = SO2
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SO2 + H2O = H2SO3
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Ca(OH)2 + CO2 = CaCO3 + H2O
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CaO + H2SO4 = CaSO4 + H2O
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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
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PHYSICAL PROPERTIES
Calcium oxide-solid-odorless-density 3,37 g x cm (Raise to the power of -3Carbon dioxide-odorless-gas-comprising 0.03% of the atmosphereSulfur dioxide-pungent odor-gas-solubility 112g/l waterMagnetite (iron oxide)-odorless-solid-magneticUranium ore-gas, solid-radioactive metal-toxic
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Oxid de calciu colour - white
Carbon dioxideis colorless
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Sulfur dioxide is coloreless
Magnetite (iron oxide)Colour:blac
k
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USES
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;
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It is found most often in fertilizers but is also included in the refractory materials –for furnaces in the metallurgy industry.
USES: Magnesium oxide -
MgO