5 Written questions
4 Multiple choice questions
- 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.
- container that can be sealed from the atmosphere and holds a drying agent
- 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.
- 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.
4 True/False questions
Gas Chromatography → An analytical technique which separates mixtures based on their distribution between a stationary liquid phase and a moving gas phase.
Vacuum Filtration → a process in which an applied vacuum draws a solution through filter paper held in a Buchner funnel.
Recrystallization → 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.
Thin layer Chromatography → A technique that uses a solid stationary phase and a moving liquid phase to separate the components of a mixture.