Yield of Cu(gly-)2.H2O ( Isomer 1) Formula weight (Mr) of (CH3CO2)2Cu.H2O = [[12.01 + (1.0079 x 3) + 12.01 + (16 x 2)] x 2 ] + 63.55 + (1.0079 x2) + 16 = 199.65g/mol Formula weight (Mr) of Cu(gly-)2.H2O = 63.55 + [[14.01 + (1.0079 x 2) + 12.01 + (1.0079 x 2) + 12.01 + (16 x 2)] x 2 ] + (1.0079 x 2 )] + 16 = 229.68g/mol Mass of (CH3CO2)2Cu.H2O = 2.0g Equation for reaction (CH3CO2)2Cu.H2O + 2NH2CH2COOH Cu(NH2CH2COO)2.H2O + 2CH3CO2H Mole ratio between (CH3CO2)2Cu.H2O and Cu(NH2CH2COO)2
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constant. RESULTS AND DISCUSSION Seven test tubes were filled with 2.0 mL of 0.10 M Cu(NO3)2 and into each test tube‚ 1.0 mL of 0.10 M NaOH was added. Using a centrifuge‚ the precipitate was settled and the supernate was discarded. 3.0 mL of distilled water and 10 drops of 0.10 M NaOH were added into each test tube. The test tubes were then prepared according to Table 1. Table 1. The reagents to be added for Cu(OH)2(s) equilibrium Test tube | Reagent to be added | 1 | 2.0 mL distilled water
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A characteristic trait of Ukraine’s export policy remains its inconsistency with the foreign policy priorities announced by the state: integration with the European Union‚ a deepening of co-operation with Russia and with the U.S. This is demonstrated by the analysis of the geographic structure of Ukraine’s exports of goods. In 1999‚ only 18.3% of goods exported from Ukraine were supplied to EU member countries (while there was a general tendency toward an increase in the EU share)1‚ and the share
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4 Plasmon Resonances for PS@Au-Cu-Ag Composite Nanoshells 4.1 Introduction As shown in recent studies‚ various methods have been developed to expand the application area of noble metal nanoparticles and to control the morphology and the behavior. Composite microspheres with noble metal nanoshells have great advantages in catalysis‚ optics‚ conductivity‚ chemical sensors‚ and so on [1–5]. Moreover‚ these hybrid materials can prevent noble metal nanoparticles from agglomerating without the use of
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CHM151LL Laboratory Report Form Fall 2011 Title: Project 5: SPECTROPHOTOMETRIC ANALYSIS OF A PENNY Date Run: 04/03/2012 Date Submitted: 04/15/2012 Grade: _____________________ Objectives: The purpose of this experiment is to use spectrophotometry to determine the percentage of copper in a copper-clad penny‚ and to determine the thickness of copper layer on the copper-clad penny. Introduction: In the spectrophotometric analysis of a penny lab‚ we will be conducting three
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check the actual equation and the actual oxidation number of iron in this reaction. This process will finally end us up of finding out which oxidation number of iron is used in this experiment. So‚ if the oxidation number is 2: Fe (Ⅱ) + CuCl2 (aq) → Cu + FeCl2 If the oxidation number is 3 the reaction equation will be: 2Fe (Ш) + 3CuCl2 (aq) → 3Cu + 2FeCl2 In addition‚ we will need to find the percent yield of copper. Percent yield is a measure of the mass of what was produced ("experimental yield")
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three different electrochemical reactions: Pb/Zn‚ Pb/Cu‚ and Zn/Cu. A salt bridge was placed between two reactions containing metal strips in separate aq solutions. The salt bridge was placed in order to balance the reaction. The voltage measurements for Pb/Zn‚ Pb/Cu‚ and Zn/Cu where .595 V‚ .479 V‚ and 1.072 V accordingly. The values obtained where then used to determine the voltage value for the reduction half. The resulting cell potential for Cu‚ Pb and Zn were calculated to be .34 V‚ -.139V‚ and
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ions in solution can react well with water. The water molecules can also be weakly bonded or more strongly as a ligand to form a complex ion‚ and these can also present in solid ‘hydrated’ salts of crystallization. For example‚ copper (II) nitrate (Cu(NO3)2∙3H2O) The metal complexes that contain at least one ammonia (NH3) ligand are called metal ammine complexes. Metal acetylacetonates are coordination complexes derived from the acetylacetonate anion(acac) and metal ions. The coordination number
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# Now You See It – Copper Cycle Lab The purpose of the lab is to discover what happens when someone executes a series of procedures‚ beginning with copper metal. What is done | What is observed | 1. Started with copper‚ Cu (s). | reddish‚ brownish‚ orange-ish‚ powder-like | 2. Added nitric acid‚ HNO3 (aq). | acid turns blue and smells like chlorine. | 3. Added water‚ H2O (l). | stayed the same | 4. Added sodium hydroxide‚ NaOH (aq). | changed consistency‚ gel-like | 5. Heated the
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INTRODUCTION TO DROSOPHILA GENETICS DROSOPHILA CULTURE We will study basic principles of Mendelian inheritance with the use of the fruit fly‚ Drosophila melanogaster [the name means “black-bodied fruit-lover”]. Drosophila was one of the first organisms to be studied genetically: its small size‚ short life cycle (10 ~14 days at 25oC)‚ high reproductive rate (an adult female can lay 400-500 eggs in 10 days)‚ and ease of culture and genetic manipulation have made it perhaps the best understood animal
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