Theoretical Yield of Alum?

What are some reasons that the percent yield of alum synthesized from aluminum foil be less than 100%?

  • I did an experiment synthesizing alum from aluminum foil, but my percent yield was significantly less that 100%. What are some reasons that may have caused this?

  • Answer:

    Some of the alum remained dissolved in the water from which your crystals of alum formed and more dissolved in the water which you used to wash the alum.

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