under the fume hood and four drops of concentrated ammonium hydroxide solution (NH4OH) was added to it. This ensured that all of the nickel ion in the solution was precipitated as nickel dimethylglyoxime (Ni(DMG)2) when the DMG was added. The Buchner funnel filtration apparatus was assembled and the filter paper was wet with a small amount of deionized water from a wash bottle. Aspiration was
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abandon a case rather than take it to court. There are three models that describe this and they are known as funnels‚ cakes and nets. The funnel model is based on crimes committed all the way down to convictions obtained. It starts with a wide top‚ illustrating crimes being committed‚ tapering to a narrow end illustrating convictions for crimes committed. The crimes in the top of the funnel have many different explanations to why they never make it to the narrow base. Some crimes are never reported
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reactants and products of the reaction. I will also determine the actual yield vs. the theoretical yield by calculating the percent yield. Materials: 1 Distilled water 1 Paper towels 1 Small paper cup 1 Coffee cup or mug 1 Beaker‚ 100 mL‚ glass 1 Funnel 1 Cylinder‚ 25 mL 1 Goggles-Safety 1 Scale-Digital-500g 1 Weighing boat‚ Plastic 1 CaCl2·2 H2O-Calcium Chloride‚ Dihydrate - 2.5 g 1 Filter Paper 12.5-cm 1 NaCO3-Sodium Carbonate - 2 g Procedure 1. Put on your goggles. 2. Weigh out 1.0 g of
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halogenoalkane Objective: To synthesis 2-cholo-2-methylpropane by using corresponding alcohol and HCl(aq). The reaction is via SN1 of tertiary alcohol. Techniques: i) Distillation of the reactant and the product ii) Purification by separating funnel Theory: In the experiment‚ SN1 reaction take place‚ HCl is added to initiate the reaction. The R-OH attack the H+ with the lone pair on O. Then the R-O+H2 bond breaks the release a water molecule and a carbonium ion. The Cl- will then attack
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and marketing to work together‚ not only would sales and demand generation improve‚ but efficiency would undoubtedly increase. Due to the current operational model in place with these departments‚ each has their own systems and processes (funnels) that are un-related and unaligned. There are no established objectives or common goals that the departments share and‚ as a result‚ there is a complete lack of systematic devices/models for executing sales and increasing demand cooperatively. From
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solution and watch the calcium carbonate precipitate form. After the Calcium Carbonate Precipitate was formed the next step was to make a funnel out of the filter paper by folding it in half twice then weighing the dry filter then opening on of the sections to make a filter in the shape of a funnel. Then I placed the funnel filter inside the actual funnel and then placed that in a coffee cup. The next step was to swirl the beaker of the precipitate to evenly distribute the contents
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benzoic acid. Objective To prepare benzoic acid from benzyl alcohol. Materials Sodium hydroxide‚ potassium permanganate‚ benzyl alcohol‚ concentrated hydrochloric acid‚ sodium sulphite‚ methyl orange solution‚ anti-bumping stone granules‚ Buchner funnel‚ 100 mL round bottom flask‚ and filter paper. Methods 1. The mass of a small empty beaker was obtained. 2. 3 mL of benzyl alcohol was transferred in to the beaker and the mass of the alcohol was weighed. 3. 2g of sodium hydroxide was dissolved in
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Shah Date: 31st Jan ‘13 EXPERIMENT # 2 RECRYSTALLIZATION; FILTRATION OBJECTIVES: 1. To perform recrystallization and filtration of given impure organic compound. 2. To purify impure acetanilide using reflux condenser apparatus and Hirsch funnel filtration. 3. To determine percentage recovery of pure material (which is)‚ purified by recrystallization and filtration. SAFETY PRECAUTIONS: 1. Operate the aspirator with the maximum water-flow using a stop cock to control the amount
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concentrated sulfuric acid‚ separatory funnel Procedure: 1. Place 50 mL of isopentyl alcohol in a 250 mL round bottom flask and add 60 mL of glacial acetic acid. Add the acid very slowly. 2. Swirl the flask and carefully add 8 mL of concentrated sulfuric acid. 3. Attach a reflux condenser‚ and using a heating mantel‚ reflux the mixture for 1 hour (do not forget to add boiling stones). Cool to room temperature. 4. Place the reaction mixture in a separatory funnel and add 55 mL of cold water
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Gravimetric Analysis CHEM 200-03 Fall Semester 2012 September 19‚ 2012 Jeff Marasigan Abstract Gravimetric analysis is based on the quantitative isolation of the desired constituent the analyte of interest from the sample in highly pure form or in some combined form and weighing the isolated constituent. The desired constituent is usually isolated or separated by precipitation. From the weights of sample and precipitate‚ the percentage of the constituent in the original sample can
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