Experiment 3 - Recycling Aluminum Results and Discussion:...

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Recycling Aluminum
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Results and Discussion: The given procedure of producing alum from aluminum and aqueous reagents was revised by scaling down the reaction, as well as by varying the concentrations of the given reagents in the laboratory, in order to produce 23.0 g of alum. The reaction utilized in this experiment was 2Al ( s ) + 2KOH ( aq ) + 4H 2 SO 4 ( aq ) + 22H 2 O ( l ) 2KAl(SO 4 ) 2 12H 2 O ( s ) + 3H 2 ( g ) After alum crystals were produced, the actual yield was calculated by weighing the crystals. The mass of the crystals is shown in Table 1. The purity of the crystals was determined by observing the temperature at which the crystal melted. Three experimental trials were performed to determine the melting point. The results are shown in Table 2. Table 1: Determination of Actual Yield of Alum Crystals Mass of crystals + weighing boat + filter paper (g) Mass of weighing boat + filter paper (g) Mass of crystals (g) Percent Yield (%) 21.549 7.649 13.87 60.30 Table 2: Determination of the Purity of Alum Crystals
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Experiment 3 - Recycling Aluminum Results and Discussion:...

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