Set up a vacuum filtration apparatus using a Buchner funnel as demonstrated by your instructor. Place a piece of filter paper flat in the funnel covering all the holes of the funnel and wet the paper with distilled water. Turn on the vacuum. Transfer all the solution and the precipitate from the 400 mL beaker to the funnel using a rubber policeman. If needed, when the level of the filtrate nears the top of the filter flask, turn off the vacuum, remove the Buchner funnel, dispose of the filtrate in the sink, replace the funnel on the filtering flask and continue filtering