petrographic examination shows calcite spare crystals with sutured and concavo-convex contacts. The calcite spars also show blocky sparite fabric‚ with syntaxial overgrowth. A poikilitic texture is vepresevled. In some parts of the crystalline limestone‚ the grains are cemented in some parts by iron oxides. Banded or laminated alabaster‚ where the amorphous carbonate constitutes and the white bands exhibit a well marked colloform structure. Coarse elongated calcite crystals attain about 2- 2.2mm‚ long and 0
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Chem 105 Guide to the Formal Laboratory Report The purpose of a formal report is to communicate effectively to another person the goal‚ procedure‚ data analysis method‚ and results of your laboratory work. The report is divided into several well-defined sections. Each section must be present in a complete report. To earn an outcome point for the laboratory report‚ a student must submit a formal lab report that earns a score of at least 90/100. Each error (factual‚ grammatical‚ typographical
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Chem 21 Fall 2009 Experiment 9 — Recrystallization _____________________________________________________________________________ Pre-lab preparation. (1) Read the supplemental material from Zubrick‚ The Organic Chem Lab Survival Manual. (2) Draw the structure of acetanilide and report relevant physical data. Be sure to cite the source of the data. You should be able to figure out what’s relevant by reading the procedure. (3) Find and report the boiling points of the solvents you will be using
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task. First‚ you add a small amount of solvent to the impure compound in a flask‚ and heat the contents until all the material has dissolved. Then‚ you cool the solution‚ allowing crystals of purified solid to crash out of solution‚ while undesirable impurities stay dissolved in the solvent. You then isolate the pure crystals by vacuum filtration‚ and discard the waste solution. Performing a recrystallization
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crystalline solid which consists of methane molecules inside the crystal structure. The methane molecules are trapped inside the cage-like structure of solid water‚ ice. Methane hydrate looks like ice‚ but it would burn and release energy when it is close to a flame. That is why it also called fiery ice. There are three types of crystal structures of methane hydrate which are determined by the number of water molecules inside the crystal. There are structure with 46‚136 and 34 number of water molecules
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----------------------------------------------------------------------- CrystalDiskMark 3.0.3 (C) 2007-2013 hiyohiyo Crystal Dew World : http://crystalmark.info/ ----------------------------------------------------------------------- * MB/s = 1‚000‚000 byte/s [SATA/300 = 300‚000‚000 byte/s] Sequential Read : 201.494 MB/s Sequential Write : 179.458 MB/s Random Read 512KB : 200.576 MB/s Random Write 512KB : 152.697 MB/s
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temperatures‚ it is possible to remove impurities by dissolving the unknown and then immediately cooling the solvent. The unknown recrystallizes‚ but the impurities remain dissolved in the solvent. It is then a relatively simple matter to filter the pure crystals out of the impure solvent (Lab Manual‚ p. 32). Once the unknown has been purified‚ it is possible to begin determining its constant properties. One specific physical property that is helpful in identifying an unknown is the substance’s melting
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Before the Loch Ness Monster had a chance to respond‚ the candy in his mouth started glowing! Sure enough‚ the candy revealed Hoodie: the third being! Crafty‚ Short Stack‚ and Princess Sofia giggled at Hoodie as he fell into the river. Hoodie then noticed the Loch Ness Monster. What was that big‚ scary monster!? Three helpless bunnies in danger…! Now was his time to shine! Hoodie hopped onto the Loch Ness Monster’s back and zoomed down the vanilla river! What a show! Hoodie skillfully hopped
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Electrophilic Aromatic Iodination of Vanillin Purpose: The purpose of this laboratory experiment is for an aromatic compound to undergo an electrophilic substitution reaction. To carry this out‚ our method combines sodium iodide and common bleach as the oxidizing agent in aqueous alcohol as the solvent. Balanced Chemical Equations: Physical Properties: Name of Chemical Chemical Structure Molar Mass (g/mol) BP/MP (ºC) Density (g/mL) Mass/Vol. Used Purpose 3-methoxy-4-hydroxybenzaldehye
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