– methanol and an unknown liquid – were calculated for through the Dumas Method. Initially‚ the sets of Erlenmeyer flasks with aluminum foil and rubber bands were weighed. Next‚ volatile liquids were placed in 125mL Erlenmeyer flasks and covered with aluminum foil‚ but small holes were made into the foil. The flask was then heated in a water bath until all of the liquid evaporated. The flask was then removed‚ and weighed again after being cooled to room temperature. To determine the molecular weight
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of an approximately 0.100 M NaOH solution. Transfer the calculated volume of the 6.00 M NaOH solution to a volumetric flask using a graduated cylinder. Obtain a 25mL buret‚ and rinse and fill it with the prepared base solution. Make sure there are no air bubbles trap within the buret. Calculate the amount of KHP required to reach equivalence point. Using a 125mL Erlenmeyer flask‚ place it on a balance‚ and add KHP to it until the balance reads the calculated the same amount as the KHP calculated
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Transfer this solution into a clean 100 mL volumetric flask‚ rinsing the beaker solution into the volumetric flask to get to 100 mL of solution. 4) Pipette 10.0 mL of the standard iron (II) solution into a 250 mL Erlenmeyer flask. 5) Titrate the acidic iron (II) sample with KMnO4 (aq). 6) Repeat steps 4 and 5 until three consistent results are obtained within 0.1 mL. 7) Pipette 10.0 mL of H2O2 (aq) solution into a clean 250 mL Erlenmeyer flask. 8) Measure out 5.0 mL of H2SO4 (aq) solution and add
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Abstract:The Wittig Reaction is a nucleophilic addition in which an alkene is formed as a product. Both the E and Z isomers of the alkene result. Substituents on the aromatic aldehyde affect the E/Z ratio of products that form. In this experiment‚ a nitro group was used as the substituent in the ortho‚ meta and para positions‚ with benzaldehyde as the control. Each of the four aldehydes reacted with (carbethoxymethylene) triphenylphosphorane to produce ethyl cinnamate‚ ethyl-3-(2-nitrophenyl)acrylate
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Introduction: Laboratory 1 is deigned to prepare students for further labs. Lab 1 allows students to practice their skills at reading data from various types of equipment. It teaches students how to use a Bunsen burner‚ graduated cylinders‚ burettes‚ Erlenmeyer flasks‚ and a balance. Besides just allowing the users to gain experience using different types of equipment‚ this lab will improve the users performance in solving problems of density‚ volume‚ mass‚ average‚ and deviation. In order to solve for density
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I have always seen paper clips as a useful material. I believe that paper clips are a part of my culture due to the 7 m high statue of paper clips situated in my home-country Norway. During World War II the statue symbolized Norwegian nationalism‚ and it was due to John Vaaler the man who invented paper clips that the statue is in Norway today. Paper clips are made from galvanized steel wire‚ meaning that the iron content is less than 100% because it also contains zinc. The galvanization method
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I9 EXPERIMENT Charles’Law MATERIALS AND EQUIPMENT 125 mL Erlenmeyer flask‚ one-hole rubber stopper‚ glass and rubber tubing‚ pneumatic trough‚ thermometer‚ screw clamp. DISCUSSION The quantitative relationship between the volume and the absolute temperature of a gas is summartzed in Charles’law. This law states: at constant pressure‚ the volume of a particular sample of gas is directly proportional to the absolute temperature. Charles’ law may be expressed mathematically: V ". T (constant pressure)
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reaction occurred. Procedure: The following procedures and materials listed are what you will need in order to conduct the experiments end lab results. Equipment needed to perform this experiment is a 50 ml test tube‚ 100 ml beaker‚ 250 mL Erlenmeyer flask‚ Buchner
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impurities‚ the lower the melting point will be (Preparation). Experimental Synthesis of Aspirin To synthesize aspirin‚ the following materials are needed: Salicylic acid‚ acetic anhydride‚ concentrated sulfuric acid‚ ethanol‚ dropper‚ 125mL Erlenmeyer flask‚ beakers (400mL‚ 100mL‚ 20mL)‚
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Experiment 2: Isolation of Eugenol from Cloves Background; Readings on Vapor pressure‚ Raoult’s Law from TRO: A mixture of the essential oils‚ eugenol and acetyleugenol‚ will be steam distilled from cloves. These compounds are isolated from aqueous distillate by extraction into dichloromethane. The dichloromethane solution is shaken with aqueous sodium hydroxide‚ which will react with eugenol‚ to yield the sodium salt of eugenol in the basic
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