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5 Written Questions

4 Multiple Choice Questions

  1. The continual boiling and condensing of a reaction mixture to ensure that the reaction takes place without the contents of the flask boiling dry.
  2. mixture of compounds to be separated is introduced onto the column that is packed with a stationary solid. The solid is continuously washed by a flow of solvent (mobile) passing through the column. The continuous flow of solvent throught the column and the interaction b/w the solid compounds in the mixture, separates the mixture as it passes down the colum.
  3. useful to separate two liquids w/ vastly diff. boiling points at least 20 degrees C.
  4. 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.

4 True/False Questions

  1. 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.

          

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

          

  3. Fractional 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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