Le Chateliers Principle Laboratory Essay - 1559 Words

Experiment title: Le Chatelier’s Principle Date conducted: 2/9/2012 Experiment purpose: ï‚ · To determine the effect of a change on a system at equilibrium and to correlate the observed responses with Le Chatelier’s principle. Experiment Chemical list: Student Provided 1 Tap water 1 Toothpicks 1 Distilled water 1 Crushed ice 2 Coffee spoons 1 Rubber bands 2 Beaker, 50 mL, plastic 1 Magnifier, dual 1 Pencil, marking 1 Thermometer-in-cardboard-tube 1 Well-Plate-24 In the Experiment Bag: LeChatelier’s Principle 1 E.D.T.A., .15 M (Na2EDTA) - 2 mL in, Pipet 1 Hydrochloric Acid, 6 M - 2 mL in Pipet 1 Magnesium Chloride, 2 M - 3 mL in Pipet 1 Phenolphthalein Solution, 1% - 0.5 mL in Pipet 2 Pipet, Empty Short Stem 1†¦show more content†¦It should shift to the right because adding the Na2EDTA lowers the concentration of the chloride ion. C. Is this reaction endothermic or exothermic? How do you know? The reaction from question (B) is a shift to the right, more products are formed making it endo thermic. It is consuming energy. Heat is required and heat is a reactant. Part II: Again prepare hot and cold water baths as instructed in Part I, Steps 1 and 2. Note: the reactions in Part II are much more subtle than those in Part I. You may have to wait 30 seconds or longer and look very carefully to observe the reaction and changes taking place! Use your magnifier to better see the changes. 1. Using a 24-well plate, add 5 drops of NaHSO4 sodium bisulfate solution to wells A1, A2, and A3. Add 10 drops to wells A4 and A5. 2. Add one drop of thymol blue indicator to each well. Stir with a clean toothpick and Solution turns wine . 3. Add one drop of Na2SO4 sodium sulfate solution to well A1 and stir with a clean toothpick. Compare the color of well A1 with that of well A2. Well A1 has an orange color compared to well A2 that is wine red. 4. Repeat Step 3, drop-by-drop, until you see a color change. 5. Add a few crystals of solid NaHSO4 to well A3. Stir with a clean toothpick, wait a while, and record your observations. Compare the color of well A3 with that of well A2. Well A3 is purplish compared to A2 that is wine red 6.Show MoreRelatedBiography and Works of Henry Louis Le Chatelier Essay2324 Words   |  10 Pagesso, but I believe that people overlook the outstanding work of Henry Louis Le Chatelier. Le Chatelier studied chemistry extensively in school and made great discoveries as a teacher of the science at colleges in France. He is most known for the principle named after him: Le Chatelier’s Principle, which I will go into detail with later in the paper. My goal in this paper is to bring to light the significance of Le Chatelier’s life and his work in the field of chemistry and science. To achieve thisRead MoreThere were many things that I learned in Module 7 . 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