then observe an unknown substance’s melting point to see if the points are the same and try to figure out the unknown. Experimental Section: The first known substance we used was Biphenyl. 68 degrees Celsius is the known melting point. We used the capillary method and observed the melting point using a Mel-temp device. The next substance whose melting point we observed was 90 % Naphthalene‚ 10 % Biphenyl. In the last part of the experiment I observed the melting point of Unknown E. After finding
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and 2 unknowns (one liquid‚ one solid) react with 3 different solvents. To identify the two unknowns‚ testing needs to be done to find the density of both the liquid and the solid‚ determine the melting point of the solid‚ and the boiling point of the liquid. The Physical Properties of Pure Substances Table can then be used to compare the observed results with the accurate properties from the table. If testing is done correctly‚ accurate assumptions can be made to figure out what the unknown substances
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in a bloody war with the Democratic Republic of Afghanistan‚ or the DRA (Unknown Author. (Unknown Date). Encyclopedia: Soviet invasion of Afghanistan. Retrieved April 4‚ 2004 from the World Wide Web: http://www.nationmaster.com/encyclopedia/Soviet-Invasion-of-Afghanistan.). This 10 year conflict caused massive amounts of destruction and mayhem for the country‚ but in the end was a military disaster (Unknown Author. (Unknown Date). Encyclopedia: Soviet invasion of Afghanistan. Retrieved April 4‚ 2004
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(50%). Although this information is reported‚ the true composition of Panacetin is questionable. While sucrose and aspirin are present in Panacetin‚ Tylenol may be replaced by an unknown component (acetanilide or phenacetin). Separation of the components of a sample of Panacetin may prove valuable in identification of the unknown component‚ as well as the true percent composition of each component of Panacetin. This experiment involves two parts‚ covering a few required techniques to be learned
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their properties. Paraffin wax was identified as a non-polar covalent solid‚ sucrose is a polar covalent‚ sodium chloride was acknowledged as an ionic solid‚ tin is a metallic solid‚ sand is a network covalent‚ unknown#1 is a non-polar covalent solid‚ unknown#2 is an ionic solid‚ and unknown#3 is a polar covalent solid. These conclusions were made based on their physical and chemical properties. Introduction Solid substances are classified by the types of bonds that hold their individual elements
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sample Observation 1. Nylon Blue‚ furry 2. Cotton Blue‚ furry 3. Silk White‚ elastic 4. Polyester Blue‚ smooth 5. Rayon White‚ elastic 6. String White‚ plastic 7. Wool White‚ fluffy Unknown 1. Blue‚ plastic Unknown 2. White‚ elastic‚ looks like silk Unknown 3. White‚ elastic Unknown 4. Pink‚ plastic Discussion: The results collected in my first table show that all fibres were soft to touch. These fibres also had differences in elasticity and some had a different texture
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Acetaminophen | 0.323 | Aspirin | 0.597 | Caffeine | 0.081 | Unknown 154 (Plate 1) | 0.081‚ 0.306‚ 0.597 | Ibuprofen | 0.698 | Salicyclamide | 0.587 | Unknown 154 (plate 2) | 0.079‚ 0.397‚ 0.587 | Discussion: The goal of this experiment was to use TLC Analysis to determine the analgesic drug present in the unknown solution 154. One observation of the unknown spotting solution was that it was cloudy. After forming the unknown spotting solution it was then heated to make it a more saturated
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and special way! -Unknown 2.) Let this be a short rest before you embark on your journey to greater challenges. -Unknown 3.) Hope you’ll soon be feeling fine the way you were before because things just won’t be the same until you’re well once more. -Unknown 4.) With the warmest of wishes‚ this just comes to say hope that you’re feeling much better today. -Unknown 5.) As you rest and heal‚ know that you are thought of warmly and wished a quick recovery. -Unknown 6.) May you find
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washed of the primary stain. Methods The method used in this experiment was derived from Cappucino and Sherman (2011) as detailed in experiment 10 with substitutions for the unknown bacteria. Aseptic lab technique was followed. One slide of the #7 unknown bacteria and one slide which included both unknown #7 and unknown #2 were prepared using the following stain technique. The initial
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NAME Lab partner- Purpose: To determine the molar mass of an unknown substance by measuring the freezing point depression of a solution of an unknown substance and BHT. Equipment: Test tube‚ 18*150 millimeters Wire stirrer Weighing dish Timer‚ seconds Chemicals: 2‚ 6-Di-tert-butyl-4-methylphenol‚ BHT‚ 16 grams Cetyl alcohol‚ CH3(CH2)14CH2OH‚ 1 gram Unknown substance‚ 1 gram Procedures: Weigh the test tube. Assemble
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