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5 Written questions

4 Multiple choice questions

  1. Separation technique used to purify particles of interest from a mixture of solids. Mixture is dissolved in saturating amounts in warm solvent. As the solution cools, the pure substance crystallizes while impurities remain in solution.
  2. An analytical technique which separates mixtures based on their distribution between a stationary liquid phase and a moving gas phase.
  3. the process in which a solid changes directly into a gas
  4. A technique that uses a solid stationary phase and a moving liquid phase to separate the components of a mixture.

4 True/False questions

  1. Vacuum FiltrationGravity filtration is used for when the desired product is in solution (usually hot) where as vacuum filtration has the desired product being a solid.

          

  2. Column ChromatographyAn analytical technique which separates mixtures based on their distribution between a stationary liquid phase and a moving gas phase.

          

  3. Simple Distillationuseful to separate two liquids w/ vastly diff. boiling points at least 20 degrees C.

          

  4. Reflux condensercondenser such that vapor over a boiling liquid is condensed and flows back into the vessel to prevent its contents from boiling dry

          

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