Transcript City Chow

Chemistry Individual Project - Presentation
Magnesium Sulphide
City Chow
F.3B (9)
Basic Information
 Molecular fomula: MgS
 Each formed by the reaction of sulphur (S) or hydrogen sulphide with
magnesium (Mg).
 Type: Ionic bonds
 Molar mass: 56.37 g/mol
 Electron diagram:
Physical Properties
* Melting point / Boiling point:: >2000°C / undefined
* Physical state at room temperature: solid
* Colour: white, red, or pale red brown
* density: 2.68 g/cm3
* solubility in water: decomposes
* Appearance: white, pale red to reddish-brown crystalline solid
Chemical properties
Reactivity:
 MgS reacts with water to give hydrogen sulphide and
magnesium hydroxide.
(i.e. MgS evolves hydrogen sulphide upon contact with
moisture.)
Laboratory Preparations:
# Store in tightly closed containers in a
cool, dry place.
# Wash hands and face after use.
# Handle in a controlled atmosphere.
# Extinguishing media: Use dry chemical,
CO2 or graphite. DO NOT USE WATER.
Chemical properties
Protection:


Respiratory: Wear dust-mist-fume
respirator.
Hands / Skin: Wear gloves made of
Neoprene(氯丁橡膠)
Eyes:

Safety goggles or glasses.
Other Protective Clothing or Equipment:
Wear protective clothing to prevent
contamination of skin and clothes.
Uses
 It is generated industrially in the production of metallic iron.
Potential Hazards
 Inhalation(吸入):
May cause sneezing, coughing, difficulty breathing, and irritation of
the respiratory tract.
 Contact with skin:
May cause irritation, itching, and dermatitis(皮膚炎).
 Contact with eyes:
May cause burning sensation, irritation, redness and watering of the eyes if it comes in contact.
Furthermore
☻Stability: Stable
☻
Element analysis:
Symbol
Element
Magnesium
Sulphur
Atomic
Mass
# of
Atoms
Mass
Percent
Mg
24.3050
1
43.117%
S
32.065
1
56.883%
Resources
~ Kosmix: http://people.kosmix.com/topic/MgS#ixzz1KYoDwefv
~ Yahoo!: http://www.yahoo.com.hk
~ Flickr: http://www.flickr.com.hk
~ Wikipedia: http://en.wikipedia.org/wiki/Magnesium_sulfide
~ Columbia Analytical Services:
http://www.caslab.com/Magnesium_sulfide_CAS_12032-369/
Chemistry Individual Project - Presentation
End.
Thank You!