1.Oxides are solid and gazieaus substances which include in their compozition two elements. One of...
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Transcript of 1.Oxides are solid and gazieaus substances which include in their compozition two elements. One of...
1.Oxides are solid and gazieaus substances which include in their compozition two elements .One of them is the oxygen.
SOSO22
Fe3Fe3O4O4
CuCuOO
Na2ONa2O
Al2Al2O3O3
CaOCaO
* Al2O3 : Is found in nature in the crystaline form is colorless called Coridon or color with different metalic oxides : Sapphire ( Blue) ; Ruby (red)
FeTiO3FeTiO3 :Are some round particles with diameter of 0,1 and 0,2 mm and is found in magmatic rock or in the river sand .
SiO2 : It`s unequal spread on the earth surface being influenced of the climatic and relief regions and of the petrographic regions construction
• * H2O : 1g/cm3• * Al2O3 : 3,9 - 4,1g/cm3• * MgO2 : 3,7 - 4,6g/cm3 • * Fe3O4 : 5,25/ cm3
* SO2 - 112g/l
* Fe2O3-Insolubility
* Cao - 1,65 g/l
Solubility
Hardness
Density
-- MgAl2O4 : 7,6 -8MgAl2O4 : 7,6 -8 - CaSiO3 : 4.5 – 5- CaSiO3 : 4.5 – 5 - Al2O3 : 9- Al2O3 : 9 - SiO2 : 7- SiO2 : 7
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+2HClCaCl2+H2O
CaO+H2OCa(OH)2
CaO+CO2CaCO3
CO2+H2OH2CO3
CO2+2NaOHNa2CO3+H2O
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
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 .
SiO2 Silica Dioxide – sand
* Is used in industry of buildings to prepare material for plaster.
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 .
PbO Lead oxide
* Is used to produce protective points.
MgO Magnezium Oxide
* Is used like a refractory material for the oreens in the iron industry to produce iron and steel .
CeO2 – Oxid de CeriuCeO2 – 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 AluminiuMgAl2O4 –Oxid de Magneziu si Aluminiu*Are very searched like gems, but unfortunately they are very rare.
V2O5 – Pentaoxidul de VariuV2O5 – Pentaoxidul de Variu*The vanadium oxide is used like Catalyzer to produce sulfuric acid.