Procedure: Mount a clay triangle on a ring stand. Clean a crucible with a small amount of HCl (Caution: Hydrochloric acid) followed by a water rinse. Caution: the crucible contents and HCI may fizz and splatter. Place the crucible (loosely covered) on the clay triangle and heat it with a Bunsen burner. Heat gently at first to prevent splattering and then heat strongly as the water evaporates. The crucible should be heated until it glows red. Carefully handle the hot crucible with tongs and place it on a sheet of wire gauze to cool. When it has cooled to room temperature, weigh the dry crucible and cover. Add approximately 1 g of the unknown mixture. Weight the crucible and mixture accurately. Trial 1 Mass of crucible, cover and unknown mixture Mass of crucible and cover _2316479 23.5219 10.1269 Mass of unknown mixture Heat the crucible 15 to 20 minutes to decompose the sodium bicarbonate in the mixture. Allow the crucible to cool and reweigh. Mass of crucible, cover and unknown mixture after heating 23,5249 061239 Weight loss Calculations: From the weight loss, which represents the weight of carbon dioxide and water vapor formed (H2CO3) determine the number of moles and number of grams of sodium bicarbonate in the sample. Determine the percent of sodium bicarbonate in the mixture. Show all calculations