a) Conical flask (preferably 250 ml) b) Funnel c) Glass rod d) Beaker (preferably 250 ml) e) Water bath f) Filter paper (Whatman paper or ordinary filter paper sheets. Preferably‚ Whatman) Chemicals Required a) CuSO4 b) NaOH solution c) Liquor ammonia solution d) Dilute H2SO4 e) Whatman Paper f) Distilled H2O Background Rayon is a synthetic fiber produced from cellulose. Developed in an attempt to produce silk chemically‚ it was originally
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Subject: Chemistry Topic: The Periodic Table The periodic table is a classification of all the elements based on ATOMIC NUMBER. It is composed of HORIZONTAL PERIODS and VERTICAL GROUPS which contain the elements arranged: *the order of INCREASING ATOMIC NUMBER *in the relation to the ELECTRON STRUCTURE of the atoms *in the relation to their CHEMICAL PROPERTIES (Criteria Used For Placing ELEMENTS in the Periodic Table) 1. ATOMIC NUMBER 2. NUMBER OF SHELLS (PERIOD) 3. NUMBER OF OUTER
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Zn(s) + CuSO4(aq) ------ Cu(s) + ZnSO4 (aq) The enthalpy changees for two different reactions will be determined practically. In the first‚ experiment delta H will be determined directly and account will be taken of heat losses by extrapolation of an appropriate graph. The second experiment involves teh inderect determination of an enthalpy change using Hess’ Law. The temperature can be measured manually but this experiment is ideal for using a data logger. In the first experiment we are trying
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Wright Date 11/10/14 Partner if applicable Part I: Observations of formation of casein precipitate The milk began to curd. As the curd increases the milk appeared more clear at times. Mass of casein 1.65 g Part II: Test tube Observation of CuSO4 biuret Test Test Results (+ or -) Casein Solution turned violet + Egg white solution turned violet + Water solution turned blue - Sugar solution turned blue - Postlab Questions 1. Whas is the theoretical yield of casein based on the table of Milk Composition
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January 2011 Math Anxiety: Fertilizer Calculations Y OU MAY KNOW people who suffer from math anxiety. They avoid situations where mathematics and calculations are required. However‚ avoiding math is simply not an option when working with agriculture. The International Plant Nutrition Institute (IPNI)... in cooperation with university specialists...has recently published a “how-to” workbook that presents commonly used mathematical concepts in agriculture. It begins with simple arithmetic
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has an oxidation number of 0 and on the side it has an oxidation number of +2. Since the copper ions increase in oxidation number‚ oxidation is taking place. Materials: 1. Reaction surface 2. Chemicals a. Cl2‚ KMnO4‚ H2O2‚ KIO3‚ K2Cr2O7‚ NaNO2‚ CuSO4‚ FeCl3‚ KI‚ starch‚ HCl‚ NaHSO3‚ Na2S2O3 3. Pipette for stirring chemicals in reaction 4. Pencil and paper 5. Safety goggles* Procedure: 1. Make a chart to record collected data from the experiment 2. Gather all necessary chemicals and other
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CHAPTER 10 Liquids and Solids 1. Order the intermolecular forces (dipole-dipole‚ London dispersion‚ ionic‚ and hydrogen-bonding) from weakest to strongest . a) dipole-dipole‚ London dispersion‚ ionic‚ and hydrogen-bonding b) London dispersion‚ dipole-dipole‚ hydrogen-bonding‚ and ionic c) hydrogen-bonding‚ dipole-dipole‚ London dispersion‚ and ionic d) dipole-dipole‚ ionic‚ London dispersion‚ and hydrogen-bonding e) London dispersion‚ ionic‚ dipole-dipole‚ and hydrogen-bonding Ans: b 2. Hydrogen
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Investigating Chemical Equilibrium Date: 30th April 2013 Due Date: 15th May 2013 Prepared For: M. Seraji Prepared by: Andrea Odunze Abstract Many reactions proceed to a state of equilibrium. A chemical reaction at equilibrium‚ where the rates of the forward reaction and reverse reaction are equal‚ looks like this: A + B AB There are three factors‚ according to Le Chatelier’s principle‚ that affect the equilibrium position and equilibrium constant. These are the concentrations of products
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you expect?-clear. What color do you expect with a base?-fuchsia j. NaOH and AgNO3 . k. AgNO3 and NH3 (ammonia). Absorb mixture onto paper towel‚ expose to intense light from a light bulb or the sun. Be patient and observe change. l. NH3 and CuSO4 Experiment Results Almost every solution made had some type of chemical reactivity. Most solutions changed colors revealing the acidity or alkalinity of a chemical and some exposing the presence of starch. The exception in the change of appearance
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Chemistry 1. Solve all the questions from HSEB question bank on the following topics:- Redox reaction Periodic Table Ammonia and Nitric acid Mole concept 2. Draw the Lewis structure of following compounds. O3‚ CO‚ HNO3‚ H2SO4‚ (NH4)2SO4‚ Ca3P2‚ Al2(SO4)3‚ KNO3 3. Prepare a term paper on “Discovery of manufacture of ammonia and subsequent awarding of Nobel Prize in 1919 to Fritz Haber and Bosch” including following points:- Percentage of Nitrogen in air and soil Importance of Nitrogen Problem of Nitrogen
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