1. Magnesium Sulphide City Chow F.3B (9) Chemistry Individual Project - Presentation

2. 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:

3. Physical PropertiesPhysical 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

4. 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.

5. 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.

6. UsesUses It is generated industrially in the production of metallic iron.

7. 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.

8. FurthermoreFurthermore ☻ Element analysis: Element Symbol Atomic Mass # of Atoms Mass Percent MagnesiumMg24.3050143.117% SulphurS32.065156.883% ☻ Stability: Stable

9. ResourcesResources  Kosmix: http://people.kosmix.com/topic/MgS#ixzz1KYoDwefvhttp://people.kosmix.com/topic/MgS#ixzz1KYoDwefv  Yahoo!: http://www.yahoo.com.hkhttp://www.yahoo.com.hk  Flickr: http://www.flickr.com.hkhttp://www.flickr.com.hk  Wikipedia: http://en.wikipedia.org/wiki/Magnesium_sulfidehttp://en.wikipedia.org/wiki/Magnesium_sulfide  Columbia Analytical Services: http://www.caslab.com/Magnesium_sulfide_CAS_12032-36- 9/ http://www.caslab.com/Magnesium_sulfide_CAS_12032-36- 9/

10. Thank You! Chemistry Individual Project - Presentation End.