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!