CHE 107 24 June 2013 Separation of a Mixture of Solids Step 1: Separating out the Iron Mass of weighing dish: 0.7g Mass of weighing dish and mixture: 5.4g Net mass of the original mixture: 4.7g Mass of 10-cm square paper: 0.8g Mass of 10-cm square paper and iron fillings: 2.0g Net mass of iron filings: 1.2g Step 2: Separating out the Sand Mass of weighing dish: 0.7g Mass of weighing dish and dry sand: 1.7g Net mass of the dry sand: 1.0g Step 3: Separating out the Benzoic
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Determination of Cations and Anions through Elimination and Confirmation Tests By: Symantha Resendiz Introduction A topic of great importance to all scientists is the identification of compounds‚ which is relevant in all aspects of their work in some way shape or form. Weather it may be determining what is causing sickness or what is polluting the air‚ it is very prevalent in the science world. In project 2‚ identification of cations and anions was preformed through a series of confirmation
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Individual Discussion Spectroscopy Dry Lab Lab Section M5 - Group 6 January 24‚ 2015 Discussion In this laboratory assignment‚ the spectroscopy data and molecular formula were given for 3 unknowns. An effort was made to conclusively identify these unknown samples using only the spectroscopy data‚ specifically 1H-NMR‚ 13C-NMR‚ and IR spectroscopy. Although mass spectrometry was given for the samples as well‚ its use was suggested only for confirmation‚ not identification‚ of the unknowns
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Contents PART XV ANALYTICAL CHEMISTRY Chapter 63 Detecting the presence of chemical species Action of heating solid sample strongly 1 Chapter 64 Separation and purification methods Centrifugation Sublimation Partition equilibrium of a solute between two immiscible solvents Two-dimensional thin-layer chromatography 2 2 3 6 Chapter 65 Quantitative methods of analysis Detection of end point in acid-alkali titration 8 Chapter 66 Instrumental analytical methods More
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will be the most important tool to have on hand for this exercise and for every quiz‚ exam and most homework problems you do. Write on it‚ use color for regions‚ and individualize it for yourself. You have been learning how to combine metal ions with nonmetal ions to write ionic compounds in lecture. In this exercise you will be learning how to name the formulas for many of these compounds‚ along with many of those you have been using in the previous experiments‚ and examples. Communication skills
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fragments are ultimately lost in the machine as mass spectrometers only work with positive ions. Stage 2: Acceleration The ions are accelerated so that they all have the same kinetic energy. Stage 3: Deflection Generally only univalent ions are present‚ so the only variable would be their masses and thus deflection is based on their mass on charge ratio (m/z) ratio. Stage 4: Detection The beam of ions passing through the machine is detected electrically. What the mass spectrometer output
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__________________ CHEMICAL NAMES AND FORMULAS SECTION 9.1 NAMING IONS (pages 253–258) This section explains the use of the periodic table to determine the charge of an ion. It also defines polyatomic ion and gives the names and formulas for the most common polyatomic ions. Monatomic Ions (pages 253–256) 1. What are monatomic ions? Monatomic ions are ions consisting of only one atom. 2. How is the ionic charge of a Group 1A‚ 2A‚ or 3A ion determined? The ionic charge is numerically equal to the group
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Ionic Compounds Ionic compounds consist of cations (positive ions) and anions (negative ions). The nomenclature‚ or naming‚ of ionic compounds is based on the names of the component ions. Here are the principal naming conventions for ionic compounds‚ along with examples to show how they are used: Roman NumeralsA Roman numeral in parentheses‚ followed by the name of the element‚ is used for elements that can form more than one positive ion. This is usually seen with metals. You can use a chart to see
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allow free movement of water as well as selected ions or molecules; these are called channel proteins. Others‚ called carrier proteins‚ bind with molecules or ions that are to be transported; conformational changes in the protein molecules then move the substances through the interstices of the protein to the other side of the membrane. Both the channel proteins and the carrier proteins are usually highly selective in the types of molecules or ions that are allowed to cross the membrane. “Diffusion”
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Qualitative Analysis-Part 2 Anions September 18th‚ 2013 Submitted to: Ron Submitted by: Chris Lab Partner: Neil Objective: Using qualitative analysis we will run a series of experiments to test for negative anions in different solutions. Rational: These experiments will allow detection of anions in a given solution. Method: CO3 Solution Iodine Solution 6M Nitric Acid SO4 Solution Sulphric Acid(H2SO4) Chloride Solution 6M Asetic Acid(CH3COOH) Barrium
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