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Identify the characteristics of a good recrystallization solvent. Select one or more: Is not an organic liquid with a low boiling point. Dissolves a chemical sample well at high temperatures. Does not dissolve a chemical sample well at high temperatures. Does not dissolve a chemical sample well at low temperatures. Dissolves a chemical sample well at low temperatures.

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Answer:

Dissolves a chemical sample well at high temperatures.

Does not dissolve a chemical sample well at low temperatures.

Explanation:

Recrystallization is a purification technique that involves mixing of an impure solid compound with a hot solvent leading to a saturated solution. As this solution cools, the compound to be purified becomes less soluble in the solvent, and pure crystals appear from the solution as the solution cools.

A good recrystallization solvent should

  • Not dissolve the compound that we want to purify at room temperature
  • Dissolve the compound completely only  at the solvent's boiling point
  • Dissolve all the soluble impurities in the sample very well at room temperature.
  • Have a fairly low boiling point such that its boiling point is lower than the melting point of the compound to be purified and evaporates easily when air-drying the sample.

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