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5 Written questions

4 Multiple choice questions

  1. Gravity 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. 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.
  3. useful to separate two liquids w/ vastly diff. boiling points at least 20 degrees C.
  4. a process in which an applied vacuum draws a solution through filter paper held in a Buchner funnel.

4 True/False questions

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

          

  2. Fractional DistillationThe separation of the components in a liquid mixture into fractions which differ in boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column.

          

  3. RecrystallizationSeparation 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.

          

  4. Refluxcontainer that can be sealed from the atmosphere and holds a drying agent