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QUESTION

For what chemical reason should you separate remaining zinc from iodine solution before adding bleach to the solution?

  1. For what chemical reason should you separate remaining zinc from iodine solution before adding bleach to the solution? (Background: zinc dust was placed in iodine tincture and left for a while, then zinc was decanted from solution, then acetic acid and HCl was added to solution)
  2. Which improbable reaction would have to occur in a mixture containing only Cu and Al for the brownish deposit to be rust? (Background: aluminum foil was dipped in a mixture of copper sulfate solution and HCl)
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