Transition Metals 1a) The d-orbitals of a free transition metal atom or ion are degenerate (all have the same energy.) However‚ when transition metals form coordination complexes‚ the d-orbitals of the metal interact with the electron cloud of the ligands in such a manner that the d-orbitals become non-degenerate (not all having the same energy.) The way in which the orbitals are split into different energy levels is dependent on the geometry of the complex. Crystal field theory can be used to predict
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Extraction of metals The History of Metals. Metals have been used by people for many thousands of years. Gold and silver‚ found as native metal‚ were used both as jewellery and as a status symbol - nothing new there. These metals were known in the Stone Age‚ but gold and silver are too soft to be used as tools. The first really useful metal to be discovered was bronze. This began the Bronze Age. Bronze was used extensively for tools and weapons in Asia and Africa from 4‚500 B.C. (6‚500 years
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Could There Be Only One Culture? Globalization is an idea which has spread throughout the whole world for the past couple centuries. Technological development has enabled the expansion of globalization. Now in 2012‚ the idea has evolved into a reality that to which every business‚ government‚ and individual has to adapt. English is inarguably the global language. Ironically‚ it is not the largest spoken language‚ but it is the most wide spread. 375 million people speak it as a first language
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aspects play into their choices‚ thoughts‚ and actions including children. When children are involved‚ an adult often chooses to follow the most morally correct way to behave‚ whether that be actions or choices. Katherine Applegate used children to show how deeply they influence the behaviors of adults in her book The One and Only Ivan. Ruby is a young elephant who moves into the mall joining Ivan‚ the gorilla‚ and Stella‚ the elephant‚ who have lived there for the majority of their lives. Her new approach
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Anionic Exchange Ion Chromatography to Detect the Anions Concentrations in the water Samples Narendra Boppana‚ Nasser Ali‚ Martin Chavez‚ Sear Introduction: Ion Exchange Chromatography is a process where the ionic exchange occurs in between the stationary phase and the sample in the mobile phase‚ by using this ionic exchange phenomenon it is easy to separate the compounds. Ionic exchange depends on the electrical properties
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Lab Report Ionic and Covalent Bonds Lab: Ionic and Covalent Bonds Introduction: The purpose of this experiment was to explore the properties of chemical substances that can be used to identify the types of bonds in a chemical substance using a laboratory procedure. The two types of bonds being identified were ionic and covalent. Based on a substance’s properties‚ how can you determine whether its bonds are ionic or covalent? This is the question I posed before starting the experiment.
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Wendell English II‚ A8 May 2‚ 2008 The One‚ The Only‚ Shel Silverstein According to one of Shel Silverstein’s most popular poetry books‚ Falling Up‚ in the poem “Woulda-Coulda-Shoulda” Silverstein writes‚ “All the Woulda-Coulda-Shouldas‚ layin ’ in the sun‚ talkin ’ ’bout the things they Woulda-Coulda-Shoulda done... but all those Woulda-Coulda-Shouldas all ran away and hid from one little Did‚” (Silverstein 65). Shel Silverstein was that “one little Did” and could never be a “Woulda-Coulda-Shoulda”
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An ion is an atom or molecule in which the total number of electrons is not equal to the total number of protons‚ giving it a net positive or negative electrical charge. The name was given by physicist Michael Faraday for the substances that allow a current to pass ("go") between electrodes in a solution‚ when an electric field is applied. It is from Greek ιον‚ meaning "going." The word ion also is responsible for electrical current being symbolized by the letter i in chemistry and physics. An anion
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Solubility product The Solubility product is related to SPARINGLY SOLUBLE SALTS ONLY!!!!! Examples are silver chloride‚ lead(II) chloride‚ calcium sulphate (in other words‚ it deals with salts commonly called insoluble salts) Consider a sparingly soluble salt MX Imagine the reaction that occurs when the solid is placed in water aMX (s) + H2O [pic] aMn+ (aq) + bXm- (aq) The equilibrium expression would be [Mn+]a [Xm-]b [MX]a [H2O]
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Why does a tetrahedral complex of the type [MA2 B2] not show geometrical isomerism? 1 (3) How do you account for the miscibility of ethoxyethane with water. 1 (4) Give the IUPAC name of the organic compound 1 O II (CH3)2 C CH C CH3 = − − (5) Name the monomers of nylon 2 or nylon 6 ploymer. 1 (6) Give one example of an artificial sweetener used by the diabetic patients. 1 (7) Direct nitration of aniline is not carried out. Explain why? 1 (8) What type of linkage holds together the monomers
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