SCIN 131 Lesson 7 Lab - Any help out there with that one

(a) Describe, in as much detail as possible, the process of recrystallization as a method for purification of a solid. How does it work? What do you do?

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(b) How do you make a “supersaturated” solution? How is this different than a “saturated” solution?

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(c) Describe what happens when solute is added to:
    a saturated solution

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   [ii] an unsaturated solution

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   [iii] a supersaturated solution

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(d) What is the role of vacuum filtration in this process of Recrystallization? How do you do it?

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(e) Suppose we are dealing with potassium nitrate as opposed to the chemical in the video. If a solution contains 28 g of potassium nitrate per 100 g of water at 25 degrees Celsius, is the solution unsaturated, saturated, or supersaturated? You may want to refer to Figure 13.4 in your text for help.

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