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Chemistry Individual Project. Presented by: Edith Lai (13) of F.3A Compound: Lithium Chloride(LiCl). Electron diagram of LiCl (showing the outermost shell only). Type of chemical bonding: Ionic Bond Chemical Formula: LiCl. Preparation.

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chemistry individual project

Chemistry Individual Project

Presented by: Edith Lai (13) of F.3A

Compound: Lithium Chloride(LiCl)

electron diagram of licl showing the outermost shell only
Electron diagram of LiCl (showing the outermost shell only)

Type of chemical bonding: Ionic Bond

Chemical Formula: LiCl

preparation
Preparation
  • Lithium chloride is produced by treatment of lithium carbonate with hydrochloric acid.

Li2CO3 + 2HCl → 2LiCl + CO2 + H2O

physical properties of licl
Physical Properties of LiCl
  • Hygroscopic(吸水)white crystalline solid
  • Odorless
  • Melting point : 605 °C
  • Boiling point : 1382 °C
  • Molar mass:42.394g/mol
  • Density: 2.068 g/ cm3
  • Solubility :highly soluble in alcohol and water

(Solubility in 20 °C water :83.2 g/100 mL )

  • Electrical conductivity: High due to its ionic structure in solution form
  • Refractive index (nD) 1.662
chemical properties of licl
Chemical Properties of LiCl
  • Stability:Stable under ordinary conditions of use and storage
  • Hazardous Decomposition Products:Emits toxic fumes of chlorine when heated to decomposition.
  • pH: Aqueous solution of LiCl is neutral or slightly alkaline
  • It is highly ionized in solution form.

(Electronic configuration of Li and Cl: 2,1and 2,8,7)

[They can form ionic compound easily as lithium can donate 1 e- to chlorine in which both of them will obtain stable octet structure.]

applications of licl
Applications of LiCl
  • Used for the production of lithium metal by electrolysis.
  •  In more specialized applications, lithium chloride finds some use in organic synthesis
  • (e.g. as an additive in the Stille reaction)
  • Used to precipitate RNA from cellular extracts in biochemical applications.
  • Used as a flame colorant  and laboratory reagent.
  • Used as a desiccant for drying air streams
  • Used as a relative humidity standard in the calibration of hygrometers.
  • Used as a brazing flux for aluminium in automobile parts.

Hygrometers

Stille reaction

RNA

potential health effects
Potential Health Effects
  • LiCl might be harmful if swallowed or inhaled.
  • It will affect the:
  • central nervous system
  • respiratory system
  • muscles and kidneys
  • It will cause severe irritation(劇烈過敏)to skin, eyes and respiratory tract.
  • Other symptoms:
  • slurred speech(口齒不清)
  • blurred vision
  • heart and brain effects.
handling and storage of licl
Handling and storage of LiCl

The following instructions should be followed while storing and handling LiCl:

  • Keep in a tightly closed container, stored in a cool, dry, ventilated area.
  • Protect against physical damage.
  • Avoid contact with eyes, skin and clothing.
  • Wash thoroughly after handling
  • Observe all warnings and precautions listed for the product .
  • Containers of this material may be hazardous when empty since they retain residues (dust, solids).
sources
Sources
  • http://en.wikipedia.org/wiki/Lithium_chloride
  • http:// www.flickr.com
  • “Compound” by Alex Brown