Properties:
Chemical Name: Zinc Oxide
Synonyms: Zinc Oxide Powder, Zinc White, Flowers of Zinc
Molecular Formula: ZnO
Mlolecular Weight: 81.38
Specific Gravity: 5.606(real); 1.2(bulk)
Melting Point: 1976centigrade
Boiling Point: Sublimation at 1800centigrade
Heat of Formation: -83.24 Kcal/mol
Free Energy of Formation: -76.08 Kcal/mol
Melting Heat: 4470Kcal/mol
Physical Properties: Yellowish-white or slightly yellow powder
Chemical Properties:
As an amphoteric oxide, reacting with acid, alkali, ammonia water produce salt, zincate, complex separately:
ZnO+4NH4OH?Zn(NH3)4(OH)2+3H2O
Reacting to salt produce double salt:
3ZnO+ZnSO4+2H2O-ZnO)3. ZnSO4. 2H2O
Reacting to carbon dioxide in air produce zinc carbonate:
ZnO+CO2?ZnCO3
Zinc oxide could be reduced to metallic zinc by carbon or carbon monoxide, but hydrogen being use as a reducant no metallic zinc could be generated:
ZnO+C?Zn+CO
ZnO+CO?Zn+CO2
For more detailed information,glen.cao at gmail dot com or 86 151 5800 4052
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