Procedure Materials Porcelain Crucible (about 2 cm wide) Crucible Tongs (30 cm) Magnesium ribbon, cut into 1/16 inch strips Bunsen burner (orange base) Porcelain triangle Ring Stand Electronic Balance (1/1000 g sensitivity) Metal Spatula Matches Methods 1a) Close Bunsen burneršs air openings. 2a) Light match 3a) Hold match over Bunsen burner 4a) Turn on gas 5a) Adjust air openings until you have a hot flame 6a) To heat the crucible, place it on the porcelain triangle and move it over the flame. 1b) Heat the crucible over the Bunsen burner for five minutes. 2b) Allow crucible to cool for five minutes. 3b) Weigh the crucible to 100th place 4b) Scrape magnesium ribbon clean 5b) Cut the ribbon into 1/16th inch pieces 6b) Place .1 to .5 grams of magnesium piece in the crucible 7b) Weigh the crucible again, with the magnesium in it 8b) Calculate mass of magnesium in crucible 9b) Heat the crucible over the Bunsen burner again for five to ten minutes. The metal should glow red. 10b) Allow the crucible to cool and reweigh it. Note any change in mass. 11b) Clean out the crucible with the metal spatula 12b) Repeat steps 1b through 11b twice more.