Introduction: Nitration is an example of an electrophile aromatic substitution reaction‚ where nitro (NO2) group is being substituted for a hydrogen on an aromatic compound. This is achieved by the formation of the nitronium ion by protonation of nitric acid from sulfuric acid. The zirconium ion is a strong electrophile and can react with aromatic compound such as Methyl benzoate to form an arenium ion intermediate. The arenium ion is then depronated to reform the aromatic ring and yield the final
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(± 0.002g) | 0.125 | Table 2 : Mass of Crucible and lid Mass of Crucible /g (± 0.001g) | 15.147 | Mass of Lid /g (± 0.001g) | 9.670 | Table 3 : Mass of Magnesium Oxide Mass of Magnesium Oxide and Crucible and Lid /g (± 0.001g) | 24.985 | Mass of Crucible and Lid /g (± 0.002g) | 24.817 | Mass of Magnesium Oxide /g (± 0.003g) | 0.168 | Mass of Oxygen reacted with Magnesium = 0.168 - 0.125 = 0.042g ± 0.005g Both the crucible and the lid are in good condition‚ with some stains.
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10/19/2011 Akruti Patel Lab Report #4: Determination of a chemical formula: the empirical formula of Magnesium Oxide 1. Purpose: Determine the empirical formula of magnesium oxide from the percent composition (this can found using the Analytical Method and the Synthesis Method). 2. Introduction: In the late eighteenth century‚ combustion has been studied extensively. In fact‚ according to Steven and Susan Zumdahl‚ Antoine Lavoisier‚ a French Chemist‚ performed thousands of combustion experiments
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concentration. Purpose The purpose of this lab is to design a procedure to analyze the amount of copper in brass using visible spectroscopy. Pre-lab 1 – 3 Safety Concentrated Nitric acid is severely corrosive Reactions of Nitric acid with metals generate nitrogen dioxide‚ a toxic‚ reddish-brown gas. Work with Nitric acid in the fume hood Copper(II) Sulfate‚ Copper(II) Nitrate‚ and Zinc Nitrate solutions are toxic and irritating to body tissue Zinc Sulfate is a mild body tissue irritant Wear
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Massing Magnesium Lab Research Question/Aim To understand the change in mass after burning magnesium and to also determine the chemical formula of magnesium oxide Hypothesis Burning the magnesium will result in an increase in mass because the magnesium will react with oxygen in the air to make magnesium oxide Variables Independent- Initial mass of magnesium (Mg) Dependent- Mass of the burnt magnesium (MgO) Controlled: Intensity of flame Apparatus used (same crucible‚ Bunsen burner
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Lab Report Abstract: The purpose of this lab was to see how magnesium reacts with oxygen. This reaction must be forced with heat. As magnesium changes to magnesium oxide the mass increased. Procedure: 1. Set up the stand and bunsen burne. 2. Go to crucible heat oven to obtain a crucible. 3. Weigh the crucible and lids mass. 4. Break up the magnesium ribbon on the crucible and weigh the mass of the magnesium‚ crucible‚ and lid. 5. Place the crucible on the ring stand over the flame. Allow
Free Force Mass Oxide
sulfuric acid and is then reacted with nitric acid. This is a highly exothermic reaction and is kept under control by means of cooling; after which the mixture is poured onto ice. The solid product will then be isolated by filtration and recrystallized from methanol‚ in which it is very soluable. A.) Materials: 1) .6mL of concentrated sulfuric acid 2) .30g of methyl benzoate 3) Mixture of .2mL of concentrated sulfuric acid and .2 mL of concentrated nitric acid 4) Ice 5) .2 mL ice cold methanol
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moles of those elements. “Empirical” also means “experimentally determined”. In this experiment‚ we find the empirical formula of the oxide of magnesium. We will accomplish this task by reacting a massed amount of magnesium with the oxygen in the air. Knowing the original mass of magnesium and the final mass of the magnesium oxide‚ you can find the mass of the oxide portion. From these two masses‚ you can find the empirical formula‚ the ratio of moles. Procedures: 1. Obtain a crucible and inspect
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Purpose: To determine the percent magnesium by mass in magnesium oxide and to observe if the percentage composition is constant by comparing class results. Hypothesis/Prediction: The percent composition by mass of magnesium in magnesium oxide will not change significantly with each group that conducted the experiment. The composition of each substance should stay the same and any differences must be due to some error. Materials:Magnesium stripCrucibleCrucible coverClay triangleIron ringRetort standTongsBalanceBunsen
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Stereochemistry of Dihydroxylation Reactions Question: Can the stereochemical outcome of dihydroxylation reactions be determined by thin layer chromatography? Overview: In this experiment‚ you will perform two reactions that transform alkenes into diols. While similar in functional group transformation‚ these reactions may lead to stereochemically different products. The two possible products are diastereomers of one another‚ and therefore have different physical chracteristics. After
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