# Report 12 - Hong Le Chemistry 1A Spring 09 Report 12 Recycling of Aluminum Objective Aluminum can be recycled as a form of aluminum compound

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Hong Le Chemistry 1A Spring 09 Report 12: Recycling of Aluminum Objective : Aluminum can be recycled as a form of aluminum compound. Aluminum is reacted with potassium hydroxide solution to yield the compound of potassium and aluminum as the form of anion. Procedure: Quality of alum 0.5077g Calculation of the percent yield of alum: 1 Mass of Al 0.5077g 2 Mass of filtrate paper 0.3116g 3 Mass of filtrate paper + alum after 1 st drying 6.9467g 4 Mass of filtrate paper + alum after 2 nd drying 6.8624g 5 Mass of filtrate paper + alum after 3 rd drying 6.6281g 6 Mass of alum 6.2527g 7 Percent of alum 77% Show step-by-step calculation: a. Moles of aluminum used: b. Theoretical yield of alum, KAl(SO4)2* 12H2O in grams: 2Al + 2KOH + 4H 2 SO 4 + 22H 2 O 2KAl(SO 4 ) 2 *12H 2 O + 3H 2 (0.0188 moles)(474.3315g/ mole of alum) = 8.9194 g alum 1mol KAl(SO4)2* 12H2O= 474.44g c.

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Write (a) total ionic and (b) net equation for the tree reactions to produce alum and (c) classify the type of reactions: . 2Al (s) + 2KOH (aq) + 6H 2 O (l) -----> 2KAl(OH) 4 (aq) + 3H 2(g) A 2Al (s) + 2K + (aq) + 2OH - (aq) + 6H 2 O (l) --------> 2K + (aq)
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Report 12 - Hong Le Chemistry 1A Spring 09 Report 12 Recycling of Aluminum Objective Aluminum can be recycled as a form of aluminum compound

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