chmlab_10 - Project Summary for From Element to Salt...

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Project Summary for From Element to Salt CHEM 123 Tashrik Ahmed 11/15/06 Santhosh Varadarajan 05/01 Objective: To prepare and recover an inorganic compound, salt, from aluminum. Procedure: “Chemical Stoichiometry”,  Chem 123 Laboratory Manual , Purdue  University, Fall 2006, pp. 45 – 50. Data: Grams of aluminum = .556g 26.98g/mol Al 474g/mol alum Grams of alum (theoretical) = 9.77g Grams of alum (actual) = 21.587 g Data Analysis: 2Al (s) + 2KOH + 6H 2 O → 3H 2 (g) + 2KAl(OH) 4 2KAl(OH) 4 + 2H 2 SO 4 + 8H 2 O → 12H 2 O+ 2KAl(SO 4 ) 2 .556 g Al * mol Al/ 26.98g * 2 mol Al/ 2 mol alum * 474g /mol = 8.89
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