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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. The 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. the process in which a solid changes directly into a gas
  4. The continual boiling and condensing of a reaction mixture to ensure that the reaction takes place without the contents of the flask boiling dry.

4 True/False questions

  1. 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.

          

  2. Vacuum Filtrationa process in which an applied vacuum draws a solution through filter paper held in a Buchner funnel.

          

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

          

  4. 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.