Cobalt prelab2 - Synthesis and Characterization of...

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Synthesis and Characterization of Cobalt(II) Coordination Compounds Kavya Siripurapu February 22, 2011 CHEM 205 AB3, TA: Chi Ting
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Chemicals Involved Chemical Hazards Formula Molar Weight 30% Hydrogen peroxide Corrosive H 2 O 2 34.02 Acetone Flammable (CH 3 ) 2 CO 58.08 Ethanol Poisonous, Flammable C 2 H 5 OH 46.07 0.1M Sodium Chloride Corrosive NaOH 39.99 6M, 12M Hydrochloric acid Corrosive, Toxic HCl 36.46 Ammonium Chloride Irritant 53.49 Conc. aqueous ammonia Toxic, Corrosive NH 3 17.03 Pink crystals of hexaaquacobalt(II) chloride Toxic 207.01 Orange crystals of hexaaminecobalt(II) chloride Irritant 267.48
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Method for Compound G 1) Under a hood 3g of well-crushed CoCl 2 .6H 2 O is mixed with 4g of NH 4 Cl and 10ml of conc. aqueous ammonia in a 125ml Erlenmeyer flask. The mixture is swirled for a few minutes to convert all of the pink crystals of hexaaquacobalt(II) chloride to orange crystals of hexaaminecobalt(II) chloride. 2) 5ml of 30%
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This note was uploaded on 04/06/2011 for the course CHEM 205 taught by Professor Oldfield,e during the Spring '08 term at University of Illinois, Urbana Champaign.

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Cobalt prelab2 - Synthesis and Characterization of...

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