| Description |
Hard, strong, silvery-white metal, protected by oxide film from reacting
with air and water. Soluble in hot concentrated HCL and NaOH solution.
Hundreds of uses as metal and alloys in aircraft, construction industry,
containers, foil, etc. Diagnostic tests:
The presence of Al (>10%) in most light-colored infusible minerals can be detected
by the
blue color which they assume when heated, then moistened with a CoNO3
solution and reheated.
From solutions, Al will be precipitated as a flocculent white or colorless
precipitate on the addition of NH4OH solution.
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