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Chemistry Presentation

Chemistry Presentation . Name: Wing Sze Class: F.3B (28) Compound assigned: Na2O. Chemical formula : Na2O Constituent elements: Sodium + Oxygen Type of bonding: Ionic Bond Formation of compound: By burning sodium in limited supply of oxygen

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Chemistry Presentation

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  1. Chemistry Presentation Name: Wing Sze Class: F.3B (28) Compound assigned: Na2O

  2. Chemical formula : • Na2O • Constituent elements: • Sodium + Oxygen • Type of bonding: • Ionic Bond • Formation of compound: • By burning sodium in limited supply of oxygen • Heat needed to start the reaction: • Gentle -Sodium oxide-

  3. -Physical properties of Na2O- • Melting point ----------- 1132°C • Boiling point ----------- 1950 °C (decomposes) • Physical state at room temperature ------- Solid • Color ----------- White • Solubility in water ----------- Soluble (react with water to form NaOH ) • Density ----------- 2.27 g/cm3 • Electrical conductivity ----- Electrical conductive

  4. -Chemical properties of Na2O- • Reacts violently with water to form NaOH (Sodium Hydroxide) • Very basic • Reducing

  5. -Laboratory preparation for Na2O- • Store in low humidity environment to prevent violent reaction between Sodium oxide and water vapor in air which will then form strong alkali, Sodium hydroxide • Put on protective gloves when handling because of its high corrosive nature • Put on safety glasses as it will result in blindness when coming into contact with eyes • Make sure that the storing container is not contaminated with water

  6. -Uses of Na2O- • Street lights (high pressure sodium lamp) -Due to the property of high brightness -Need relatively small amount of energy to glow • Highway lights -Due to the property of high brightness • Used in ceramics as a glaze additive • A significant component of glasses and windows -Sodium oxide does not explicitly exist in glasses, since glasses are complex cross-linked polymers. -It is added in the form of "soda" (sodium carbonate). -Chemical formula of glass: Na2O + SiO2 →Na2SiO3 -Manufactured glass contains around 15% sodium oxide, 70% silicon dioxide and 9% calcium oxide. -The sodium carbonate "soda" serves as a flux to lower thetemperature at which the silica melts.

  7. -Potential Hazards- ///Health hazard/// • Very corrosive and irritating to skin, eyes, and mucous membranes • Inhalation, ingestion of vapors, dusts or other substances containing sodium oxide may cause severe injury, burns or death • Reaction with water or moist air will release toxic, extremely corrosive or flammable gases • Reaction with water will generate large amount of heat that will greatly increase the concentration of toxic, irritating fumes in the air • Runoff from fire control or dilution water may be corrosive and toxic and cause pollution

  8. -Potential Hazards- ///Fire hazard/// • Non-combustible, does not burn itself in fire • when heated to decomposition it emits toxic, irritating fumes of Na2O • Vapors may accumulate in confined areas (basement, tanks, hopper cars, tank cars) over a long period, which will later react with water violently, releasing toxic gases • Contact with metals may evolve flammable hydrogen gas • Containers may explode when the contained sodium oxide is heated or when the container is contaminated with water

  9. 哥士的=CAUSTIC SODA=Sodium Hydroxide=Strong Base Misuse of Sodium hydroxide (formed when sodium oxide react with water) can really be disastrous!!!!!!!!!!!

  10. -Special characteristics of Na2O- • Mixtures with phosphorus (V) oxide react violently when warmed or on contact with moisture. • Reacts vigorously with water and nitric oxide above 100°C • Ignites when mixed with 2, 4-dinitrotoluene • Corrosive • Non-flammable • Irritant to skin

  11. -Resources- • http://www.lookchem.com/SODIUM • http://hk.knowledge.yahoo.com/question/question?qid=7010020601568 • http://en.wikipedia.org/wiki/Sodium_oxide • http://www.britannica.com/EBchecked/topic/552271/sodium-oxide • http://wiki.answers.com/Q/Is_Sodium_oxide_acidic_or_basic • http://www.buzzle.com/articles/sodium • http://wn.com/ionic_conductivity • http://www.minhhieutrans.com/sodium-oxide.htm • http://www.webelements.com/compounds/sodium/disodium_oxide.html • http://wn.com/sodium_oxide

  12. /// THE END///

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