1. Chemistry Individual Project Work - CaBr2 Candy Tsang F.3C (29)

2. The ionic compound Name: Calcium bromide Formula: CaBr2 Electronic diagram:

3. Physical properties Features: 1) State: solid 2) Appearance: white crystal powder 3) Purity: 95% min. 4) Melting point: 730°C &Boiling point: 806°C 5) Density: 3380 kg m-3 6) Molar mass of CaBr2 = 199.886 g/mol 7) Solubility in organics = insoluble

4. Chemical Properties 1) PH value: 7-9 2) Toxicity: Oral rat LD50: 4100mg/kg 3)When strongly heated in air, calcium bromide will produce calcium oxide and bromine. 2 CaBr2 + O2 → 2 CaO + 2 Br2 In this reaction the oxygen oxidizes the bromide to bromine.

5. Others Uses: Mainly applied in ocean oil wells as completion fluid, stationary liquid and workover fluid Can be found in: drilling fluids, neuroses medication, freezing mixtures, food preservatives, photography and fire retardants Prices: $138 for 500g

6. Resources http://en.wikipedia.org/wiki/Calcium_bromi dehttp://en.wikipedia.org/wiki/Calcium_bromi de http://chemideal.en.alibaba.com/product/3 21892165- 210230229/Calcium_Bromide_Liquid.htmlhttp://chemideal.en.alibaba.com/product/3 21892165- 210230229/Calcium_Bromide_Liquid.html http://www.calciumbromide.net/ http://www.chemicalbook.com/ChemicalPr oductProperty_EN_CB3210471.htmhttp://www.chemicalbook.com/ChemicalPr oductProperty_EN_CB3210471.htm http://www.google.com.hk/