Recycling Aluminum - Results and Discussion: This...

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Results and Discussion : This experiment involved the chemical recycling of aluminum from a can by converting it to alum (KAl(SO 4 ) 2 * 12H 2 O). The procedure was scaled down to produce a theoretical yield of 23 grams of alum. To do so, gravity filtrations (to use isolated liquids) and vacuum filtrations (to use isolated alum crystals) were incorporated. The reaction utilized in this experiment was: 2Al (s) + 2KOH (aq) +6H 2 O -> 2K + (aq) + 2Al(OH) 4 - (aq) + 3H 2(g) Actual yield was maximized (Table 1 shows percent yield) and melting point was measured to determine the purity of alum (Table 2). Table 1: Mass of Alum Crystals to Determine Actual Yield Mass of alum + weighing boat + filter paper (g) Mass of weighing boat + filter paper (g) Mass of alum (g) Percent yield (%) 24.507 6.986 17.521 76.178% The mass of alum crystals was calculated from subtracting the mass of the weighing boat and filter paper from the mass of the alum, weighing boat, and filter paper. An example of this calculation using data from Table 1 follows:
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This test prep was uploaded on 02/01/2008 for the course CHEM 342132 taught by Professor Davis during the Spring '08 term at Cornell University (Engineering School).

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Recycling Aluminum - Results and Discussion: This...

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