Recycling Aluminum - Recycling Aluminum By Lionel Sims III...

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Recycling Aluminum By Lionel Sims III Lab Instructor: Roy October 12, 2007
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Results and Discussion: Aluminum strips were used in the obtainment of alum, alum is a name given to a group of chemicals with the general formula MM’ (SO 4 ) 2 12H 2 ), where M is a monovalent cation and M’ is a trivalent cation. The particular form of alum synthesized in this experiment was potassium aluminum sulfate dodecahydrate [KAl(SO 4 ) 2 · 12 H 2 O], in the solid form of crystals, through a series of chemical reactions. A theoretical yield of 23g was expected. The net of these reactions is shown by the reaction below: 2 Al( s ) + 2 KOH( aq ) + 4 H 2 SO 4 ( aq ) + 22 H 2 O( l ) 2KAl(SO 4 ) 2 · 12H 2 O( s ) + 3H 2 ( g ) During the first week of the experiment, four different reactions took place, numbered 1-4 below. 1. 1.31g of Aluminum strips were cut from a soda can and added to 66 ml of 1.4M KOH and heated on hot plate. The solution was watched until it stopped releasing H 2 . The new solution began to turn black and the Al almost completely dissolved in it. The solution had to then be filtered using gravity
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This lab report was uploaded on 04/18/2008 for the course CHEM 2070 taught by Professor Chirik,p during the Fall '05 term at Cornell University (Engineering School).

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Recycling Aluminum - Recycling Aluminum By Lionel Sims III...

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