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recycling aluminum

recycling aluminum - Recycling Aluminum by Irina Starkova...

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Recycling Aluminum by Irina Starkova Lab Instructur: Hasan Arslan October 8th, 2009
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Irina Starkova PURPOSE The purpose of this experiment was to produce 23 grams of alum from 1.307 grams of aluminum. The following reaction was to take place: 2Al(s)+2KOH(aq)+4[H2SO4](aq)+22[H20]→2KAl(SO4)2*12[H20]+3[H2](g) This reaction is not ideal, however, so the aim in performing this experiment was to produce an amount of aluminum with a minimum of 60% yield (percent yield being the observed amount of product divided by the expected amount of product and multiplied by 100). Another goal was to determine the melting point of the alum produced, which when compared to the actual, known melting point of alum (92.5 degreed C) would serve to determine how pure the alum produced was. Results: The mass of the weighing boat and filter paper onto which the alum crystals were places was found to be 7.366 g, and the mass of the weighing boat, filter paper and alum crystals were found to be 20.344 g. The difference of these two values was the mass of alum crystals produced: 12.978 g. A similar result was calculated by measuring the mass
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