experiment21

experiment21 - DATA Part 1. Synthesis of...

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DATA Part 1. Synthesis of Hexaammincobalt(III)chloride, [Co(NH 3 ) 6 ]Cl 3 Weight of CoCl 2* 6H 2 O 1.001 g Weight of Ammonium Chloride .704 g Weight of Product Part 2. Synthesis of Pentaamminechlorocobalt(III)chloride, [Co(NH 3 ) 5 Cl]Cl 2 Weight of CoCl 2* 6H 2 O 1.001 g Weight of ammonium chloride .700 g Weight of Product .446 g Part 3. Synthesis of trans -[Co(en) 2 Cl 2 ]Cl Weight of CoCl 2* 6H 2 O 1.500 g Weight of the product 0.62 g
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Dominique Liuzzi Chem 1CL W 8PM Gloria Mo 13 May 2008 Experiment 21: Synthesis of Transition Metals Intro: The purpose of this lab is to synthesize and isolate the cis and trans isomers of [Co(en) 2 Cl 2 ]Cl. We will also synthesize and analyze [Co(NH 3 ) 6 ]Cl 3 and [Co(NH 3 ) 5 Cl]Cl 2 . We will see the effect of ligan field strength on the color of a compound. Part 1. Synthesis of Hexaammincobalt(III)chloride, [Co(NH 3 ) 6 ]Cl 3 In part one of this lab, we synthesized Hexaammincobalt(III)chloride. After weighing out and mixing 1.001 g of CoCl 2* H 2 O, 0.704 g of ammonium chloride, and 1 mL of DI water, the mixture turned purple with strong red tones. We then added 3 mL of concentrated ammonium hydroxide, and then 3 mL of 10% hydrogen peroxide, which caused the solution to fizz almost to the top. The reaction was exothermic and released a substantial amount of heat. The solution coagulated a slight amount. These chemicals mixed according to the reaction equation: 2CoCl 2 *6H 2 O + 2NH 4 Cl + 10NH 3 + H 2 O 2 2[Co(NH 3 ) 6 ]Cl 3 + 14H 2 O Once we continued with steps 6-14, we weighed our product and measured it to be 2 g. We calculated that the limiting reagent is CoCl
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experiment21 - DATA Part 1. Synthesis of...

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