Lab Inv 15 experiment Lecture to post - CHE115 General...

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CHE115GeneralChemistry ISpring 2012Investigation 15“Is It Economical toRecycle Aluminum?”
Reactions2Al (s)+2KOH (aq)+6H2O(l)2K+(aq)+2Al(OH)4-(aq)+3H2(g)Aluminum foil1.01.5 gPotassium Hydroxide??g (use 10-20% excess)Water?? mL (enough to dissolve KOH )HeatHow will you know when this reaction is complete?
Reactions2Al(OH)4-(aq)+H2SO4(aq)2 Al(OH)3(s)+SO42-(aq)+2H2O (l)From 1streaction9M Sulfuric Acid??mLCool first!What will you observe to tell that a reaction is taking place?
Reactions2 Al(OH)3(s) +3H2SO4(aq)2Al3+(aq) +3SO42-(aq)+6H2O (l)From 2ndreactionMore 9M Sulfuric Acid??mLHow will you know when this reaction is complete?
ReactionsAl3+(aq) +K
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