Exp 2. Reactions of Hydrocarbons Report SP22

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T.C. YILDIRIM BEYAZIT ÜNİVERSİTESİ REKTÖRLÜĞÜ *

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102

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Chemistry

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Nov 24, 2024

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pdf

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3

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CHEM 1111: General Chemistry I Lab 1 REACTION OF HYDROCARBONS REPORT Place your answers in this report and submit in the correct Canvas Dropbox (as a pdf file) before the deadline. Procedure: Part A. Combustion Tests: Flame Smoke Residue Hexane Orange color No Smoke No Residue Cyclohexene Orange with Blue bottom Black Smoke Black Residue more Fire Toluene Orange color More Black Smoke Black Residue, Shoots residue a lot more fire Unknown 1 Orange Flame No Smoke No Residue Unknown 2 Orange Flame Black Smoke Black Residue Shooting, Black Particles Part B. Testing with Potassium Permanganate: # of drops Other observations Hexane 20 Drops Did not react but it mixed with the KMnO 4 . Cyclohexene 1 Drop The mixture changed to brown. Toluene 20 Drops It did not mix we observed some layers. Unknown 1 20 Drops Did not react but it mixed. Name AZAM ALSADI Partner MOUSA AL TAMEEMI Date 09/25/2023 Section 101 In our experiment, we added 20 drops of toluene, hexane, cyclohexane, and two random mixtures before setting them on fire. The flames' color, the presence of smoke, and the density of the smoke were all carefully examined and noted. We observed that these findings were influenced by the type of hydrocarbon and its chemical make-up. Further investigating the interactions between various hydrocarbon compounds, we added 20 drops into test tubes and mixed them with other hydrocarbons to observe their mixing behavior.
CHEM 1111: General Chemistry I Lab 2 Unknown 2 20 Drops Did not react but it did mix Part C. Classification of the Unknowns Identity Explanation Unknown 1 Hexane/Alkane Unknown 1 and Hexane/Alkane both did not bring any reaction but they both mixed. Unknown 2 Toluene/Aromatic Unknown 2 and Toluene/Aromatic both did not bring any reaction, but they also did not mix. Figure:
CHEM 1111: General Chemistry I Lab 3 Post-lab Questions: 1. What are the products produced when a hydrocarbon undergoes combustion? 2. A hydrocarbon floats on top of a potassium permanganate solution and fails to change the purple color of the solution when it is thoroughly stirred with it. The same hydrocarbon, when it is burned, gives a light blue flame with little or no smoke and leaves no residue in the evaporating dish. Which of the following hydrocarbons is it most likely to be: pentene (an alkene), isooctane (an alkane), or xylene (an aromatic hydrocarbon)? Explain your answer. 3. Provide a general conclusion for this experiment. The produced are Water and Carbon Dioxide. Alkane isooctane exhibits a clear, blue flame when burned in an oxygen environment, but it remains colorless when exposed to potassium. Since many hydrocarbons lack polarity, they do not interact with KMnO4. The energy of the bonds increases as the number of bonds increases from one to two to three, leading to the production of more smoke and residue.
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