Anyone know a simple test to detect the presence of Aluminum ions?
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I'm performing a single replacement reaction with Aluminum foil inside copper (II) chloride solution. My goal is to decant the copper particles that form in the reaction from the aluminum chloride solution. Does anyone know a simple test to perform to make sure that the separated copper particles contain absolutely no aluminum ions? This is what I found so far: http://wiki.answers.com/Q/Describe_the_test_for_aluminium_ions Can anyone confirm this? Thanks! :)
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Answer:
See Wkipedia on Qualitative inorganic Analysis - 3rd analytical Group of Cations: test for Al ion - add NH4OH solution - gives a gelatinous white precipitate
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Other answers
To test for the presence of aluminum a gelatinous precipitate of Al(OH)3 is formed when ammonia is added to the aluminum ion. Upon dissolving the precipitate with acetic acid and adding cathecol violet, the solution turns pale blue. You must have the gelatinous precipitate for aluminum to be present.
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