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Why are there crystals formed when a hot saturated solution is allowed

  1. Oct 11, 2011 #1
    1. The problem statement, all variables and given/known data


    why are there crystals formed when a hot saturated solution is allowed to cool? the solid has already dissolved into the solution, forming the solute, so when the solution is cooled, and the temp decreases. does this mean they dissolve out of the solution?



    (i know this hypothesis may sound ridiculous but yeah)
     
  2. jcsd
  3. Oct 12, 2011 #2

    Borek

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    Staff: Mentor

    Re: crystallization

    Solubility is often temperature dependent, and in most cases (but not all) goes up with temperature. When temperature changes and solution becomes supersaturated, solute "leaves" the solution.
     
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