1. CuO SO2 CaO Na2O Fe3O4 Al2O3 Oxides
1.Oxides are solid and gazieaus substances which include in their compozition two elements .
One of them is the oxygen.
SO2
Na2O
CuO
CaO
Fe3O4
Al2O3

2. Naturally state.
2. * CO2 : Is found free in the atmosphere, approximate 0,03% in carbonated waters too.

3. * Al2O3 : Is found in nature in the crystaline form is colorless called Coridon or color with different metalic oxides : Sapphire ( Blue) ; Ruby (red)

4. Fe2O3: Is found in nature as iron ore.

5. FeTiO3 :Are some round particles with diameter of 0,1 and 0,2 mm and is found in magmatic rock or in the river sand .

6. SiO2 : It`s unequal spread on the earth surface being influenced of the climatic and relief regions and of the petrographic regions construction

7. MgAl204 -Spinel : Is frequently founded in magmatic rokc and
metamorphic rock like mottle.

8. Clasification ! CO2, SO3, P2O5, SiO2 Na2O , Fe2O3, Al2O3,Li2O
3.Basic oxides (metallic) :
Acid oxides (nemetalic) :
Na2O , Fe2O3, Al2O3,Li2O

9. Physical properties CaO Fe3O4 * Solid : Fe3O4,Al2O3,CaO,CuO
* State of matter
* Solid : Fe3O4,Al2O3,CaO,CuO
CaO
Fe3O4

10. Gazeous : CO2,SO2,NO2,P2O5,HgO.
NO2
CO2
P2O5
SO2

11. * Fluid :H2O

12. Color * White: ZnO * Black : CuO * Blue :MnO2 *Yellow: PbO
*Green:Cr2O3

13. Solubility Hardness * SO2 - 112g/l Density - MgAl2O4 : 7,6 -8
* Fe2O3-Insolubility
* Cao - 1,65 g/l
Density
* H2O : 1g/cm3
* Al2O3 : 3,9 - 4,1g/cm3
* MgO2 : 3,7 - 4,6g/cm3
* Fe3O4 : 5,25/ cm3
Hardness
- MgAl2O4 : 7,6 -8
- CaSiO3 : 4.5 – 5
- Al2O3 : 9
- SiO2 : 7

15. Chemical properties a.*Basic oxides react with water forming bases.
* Acid oxides react with water forming acids.
* Basic oxides react with acids forming : water + salt
*Acid oxides react with bases forming salt + water .
b.CaO+2HClCaCl2+H2O
CaO+H2OCa(OH)2
CaO+CO2CaCO3
CO2+H2OH2CO3
CO2+2NaOHNa2CO3+H2O

17. c. Inferior oxides react with oxygen forming superior oxides .
Eg : 2SO + O2  2SO2
2NO + O2  2NO2
2CO + O2  CaCO3
d. Some acid oxides react with basic oxides forming salt
Eg : CaO + CO2  CaCO3
NaO + SO2  NaSO3
MgO + CO2  MgCO3

18. Utilizari CaO - Calcium Oxide  Line
* Is used in the industry of buiding to prepare material for plaster, like gyps , or to white wasted the walls ; in the chemical industry is used to improve the acid varieties .
Utilizari
ZnO  Zinc oxide - white of zinc
* Is mainly used like a white colour in the plastic industry ;paper ; but is also used in pharmace utical industry and cosmeties industry .
SiO2  Silica Dioxide – sand
* Is used in industry of buildings to prepare material for plaster.
MgO Magnezium Oxide
* Is used like a refractory material for the oreens in the iron industry to produce iron and steel .
PbO  Lead oxide
* Is used to produce protective points.

19. CeO2 – Oxid de Ceriu
*Is used like "jeweler`s makeup"
in the walls of the oven with function of self-cleaning.
MgAl2O4 –Oxid de Magneziu si Aluminiu
*Are very searched like gems,
but unfortunately they are very rare.
V2O5 – Pentaoxidul de Variu
*The vanadium oxide is used like
Catalyzer to produce sulfuric acid.