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
Heat needed to start
the reaction:
Gentle
-Sodium oxide-
-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
-Chemical properties of Na2O-
Reacts violently with water to form
NaOH (Sodium Hydroxide)
Very basic
Reducing
-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
-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 the
temperature at which the silica melts.
-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
-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
Misuse of Sodium hydroxide (formed when
sodium oxide react with water) can really
be disastrous!!!!!!!!!!!
-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
-Resources• http://www.lookchem.com/SODIUM
• http://hk.knowledge.yahoo.com/question/question?qi
d=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_o
r_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/di
sodium_oxide.html
• http://wn.com/sodium_oxide
/// THE END///