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Unformatted text preview: Recycling Aluminum October 12, 2007 Results and Discussion Statement of purpose Observations/data tables Calculations Balanced equations Evaulation of results Final conclusions The purpose of this experiment was to investigate the synthesis of alum from impure aluminum, and to develop a procedure that would theoretically yield 23 g of alum. The melting point of the isolated alum crystals was then determined in a series of three trials. The purity of the synthesized alum is related to the the smaller the average deviation from the standard melting point, the purer the alum crystals. Reactions For detailed observations of each reaction, see Procedure section. 1. 2Al (s) + 2KOH (aq) + 6H2O (l) 2K + (aq) + 2Al(OH) 4- (aq) + 3H 2 (g) 2. 2Al(OH) 4- (aq) + H + (aq) Al(OH) 3(s) + H 2 O (l) 3. Al(OH) 3(s) + 3H + Al 3+ (aq) + 3H 2 O (l) 4. K + (aq) + Al...
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- Fall '05