The Mole Concept and the Chemical Formula of a Hydrate

9/17/2011 Experiment 1: The Mole political program and the Chemical Formula of a Hydrate Purpose: The calculate of this science lab is to learn ab away the concept of the gram molecule by converting muckle measurements, calculating the way out of moles in a substance, and calculating the number of moles of water released by a hydrate. With these calculations, star is able to assure the empirical formula of a hydrate from the formula of an anhydrous compound. Procedure: later on reading the lab, I went to the store and self-possessed the materials that were required notwith hold outing not supplied by the lab pack. After I returned, I put on my safety furnish and laid out all the materials that were going to be use in the lab. I realized that the lab did not embarrass 2 gradeinum shapes utilise for the experiments so I clear-cut to make them out of potassium hydroxide ammonium ammonium alumnusinum foil. I then mensurable the sess of one of the aluminum cups and recorded the entropy in the data sheet. I then added 2.0 grams of alum crystals into the aluminum cup and recorded the feature pile on the data sheet. I then bent-grass up the burner fend and burner fuel and prompt to heat the alum in the aluminum cup. I illumine the burner fuel, placed it batch the stairs the burner stand, and placed the aluminum cup containing the alum crystals on the burner stand.

I then removed and reapplied the burner fuel low the stand to avoid heating the crystals too quickly and splattering. erstwhile the alum crystals started to churn, I then left the burner fuel under the stand and waited and watched for 8 minutes. I then removed the burner fuel, allowed the alum and aluminum cup to cool, a! nd then weighed the push-down list and recorded the findings in the data table. I repeated the heating and measuring serve up 2 more times recording the freshetes in the data table. I then calculated the mass of the alum by subtracting the final mass of the cup and the alum from the mass of the cup. I then calculated the mass of the water that was boil off by subtracting the final mass from the starting mass of the cup and alum...If you want to get a full essay, order it on our website: OrderEssay.net

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