After transferring all of the contents to the funnel wash the precipitate with two or three 5 mL portions of distilled water. Do this by adding each portion to the beaker in which you did the precipitation to transfer any remaining precipitate; then pour over the solid in the funnel. Finally, pour two 10 mL portions of 75% isopropyl alcohol through the filter paper. When all the liquid has precipitate and place on a marked paper rowel. Blot your samples dry with a second paper towel. Allow it to dry until the next lab period.
When the product is dry, weigh a clean, dry watch glass to the nearest 0.01 g and record the mass. Carefully scrape all the precipitate off the filter paper onto the watch glass and weigh it and record the mass.