(10-11) F3 Chemistry Individual Project Work Ionic

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(10-11) F3 Chemistry Individual Project
WorkIonic Covalent compounds
Shirley Kam (9) F.3A

• Compound Magnesium sulphide (MgS)

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Magnesium sulphide

• Formula MgS
• Electron diagram

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Magnesium sulphide (MgS)
Physical properties

• Melting point
• gt2000 C
• Physical state at room temperature
• Solid
• Colour
• reddish-brown, white or red
• Density
• 2.68 g/cm3
• Solubility in water
• decomposes
• electrical conductivity
• Semi-conductor

• Boiling point
• No data

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Magnesium sulphide (MgS)

• Chemical properties
• Laboratory preparation
• MgS is formed by the reaction of sulphur or
  hydrogen sulphide with magnesium.
• Magnesium sulfide, MgS, can be produced by
  heating magnesium to 500-600C with sulfur or
  SO2 and H2S.
• the process takes place in fume cupboard as the
  compound will produce toxic gas
• Reactivity towards water
• Give hydrogen sulphide and magnesium
  hydroxide
• Reactivity with oxygen
• Form the corresponding sulfate, magnesium
  sulfate

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Magnesium sulphide (MgS)

• Uses
• BOS steelmaking
• wide band-gap direct semiconductor of interest as
  a blue-green emitter
• Phosphor making which can be used in radiation
  dosimetry as optically stimulated luminescence
  and thermoluminescence dosimeters, in radiography
  as infrared sensors, etc.

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Magnesium sulphide (MgS)

• Potential hazards
• Fire and explosion hazards
• When heated to decomposition, it may emit
  toxic fumes of SOx. Sulphides can react violently
  when exposed to flame or oxidizers. Hydrogen
  sulphide is evolved upon contact with
  water/moisture.

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Magnesium sulphide (MgS)

• Health hazard caused by the exposure of Magnesium
  sulphide
• Inhalation May cause sneezing, coughing,
  difficult breathing, and irritation of the
  respiratory tract.
• Skin May cause irritation, itching, and
  dermatitis.
• Eye May cause burning sensation, irritation,
  redness and watering of the eyes if it comes in
  contact.

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Magnesium sulphide (MgS)

• Conditions to Avoid Heat, flame and incompatible
  materials.
• Incompatibility (Material to Avoid) Strong
  acids, strong bases, oxidizers, water/moisture.

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Magnesium sulphide (MgS)

• Special precautions
• Precautions to Be Taken in Storage and Handling
• Store in tightly closed containers in a
  cool, dry place. Wash hands and face after use.
• Other Precautions Handle in a controlled
  atmosphere.
•  
• Work Practices
• Implement engineering and work practice
  controls to reduce and maintain concentration of
  exposure at low levels. Use good housekeeping and
  sanitation practices. Do not use tobacco or food
  in work area. Wash thoroughly before eating and
  smoking. Do not blow dust off clothing or skin
  with compressed air. Maintain eyewash capable of
  sustained flushing, safety drench shower and
  facilities for washing.
•  

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Magnesium sulphide (MgS)

• Special characteristic
• Aside from being a component of some slags,
  MgS is a rare nonterrestial mineral niningerite
  detected in some meteorites.

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Resources

• Wikipedia
• http//en.wikipedia.org/wiki/Magnesium_sulfide
• 2. Webelements
• http//www.webelements.com/compounds/magnesium/mag
  nesium_sulphide.html
• 3. The Free Dictionary
• http//encyclopedia2.thefreedictionary.com/Magnesi
  um
• 4. ESPI
• http//www.espi-metals.com/msds27s/Magnesium20Su
  lfide.htm

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The End