09-28-2022, 07:37 AM
Al2O4 is the only stable oxide around STP, so "partial oxidation" would mean having unreacted Al metal. Calculated what weight of Al2O3 you should get with 100% reaction and compare.
And that's the problem - the oxide layer does a good job at protecting the underlying metal that it's difficult to get full conversion. You'd do better finding some Al2(SO4)3 in a garden supply store and precipitating the hydroxide using NaOH, Na2CO2, NaHCO3, or even aqueous ammonia. The product will be purer as well, most metallic Al is some alloy or other.
And that's the problem - the oxide layer does a good job at protecting the underlying metal that it's difficult to get full conversion. You'd do better finding some Al2(SO4)3 in a garden supply store and precipitating the hydroxide using NaOH, Na2CO2, NaHCO3, or even aqueous ammonia. The product will be purer as well, most metallic Al is some alloy or other.