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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. 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. 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.
  4. An analytical technique which separates mixtures based on their distribution between a stationary liquid phase and a moving gas phase.

4 True/False questions

  1. Desiccatorcontainer that can be sealed from the atmosphere and holds a drying agent

          

  2. 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.

          

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

          

  4. Reflux condenserThe continual boiling and condensing of a reaction mixture to ensure that the reaction takes place without the contents of the flask boiling dry.

          

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