Question:

When Aluminium reacts with an alkaline, a black-grey substance is produced, what is it?

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what reacts to form it as well...?

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  1. They are all wrong, aluminum oxide is white and soluble in alkaline solutions.  It is the alloy constituents like copper and silicon.  if you used pure aluminum there would be no black stuff  


  2. What you are talking about is probably aluminum oxide which occurs when the two substances react with each other.

  3. Aluminum Oxide is black

  4. Aluminium oxide is formed


  5. It will most likely be carbon

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