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    Ionic Bond

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    When ionic solids dissolve, they divide to give their positive and negative ions that make up the solids. These ions become hydrates and have the same relative proportions when in solution and when solid. The more the solid dissolves, the more the ion’s concentration increases. This increase and build-up allows for the reverse reaction to occur. In this phase of the reaction the ions crystallise out in order for the reaction to have a greater chance of occurring. Eventually the rate of dissolving

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    The Ionic Column

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    The Ionic Column Throughout history, art has become the main source for entertainment, enlightenment, and acknowledgement. It entertains those who are bored in the everyday life. It enlightens those who seek another world and those who seek beauty with wild imaginations. It acknowleges those who seek development in nature and their own world. From the cave drawings of Paleolithic art in Lascaux , to the Ancient Egyptian pyramids, and to the classical Greek sculptures, art is a never ending cycle

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    Ionic Liquids

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    Introduction Ionic liquids is a broaden term covering several possible systems. Ionic liquids are liquids that consist of exclusively ions, which exhibit ionic conductivity. The traditional definition known is molten salts or fused salt, which tend to have high melting points. For a while now the generalized definition of ionic liquids has only limited itself to the specific definition, which have melting points or has glass transition temperatures of 100 degrees. There are also the room temperature

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    Ionic and Covalent Bonding Ionic and covalent bonding is involved when the atoms of an element chemically combine to make their outer shells full and to make the atoms stable. The first type of bonding you can get is ionic bonding. Electrons are transferred from one atom to another to try and create full outer shells, this gain and loss of electrons on the atoms results in positive and negative ions. In these compounds you get electrostatic force, this is the force/attraction that occurs

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    Compounds are pure substances that contain atoms of two or more elements chemically combined in fixed ratios. In this lab, we observed two types of compounds, Ionic compounds and Covalent compounds. Ionic compounds are chemical compounds consisting of two or more ions that are held adjacent to each other by electrical attraction. “One of the ions, called an “anion,” has a negative charge, and the other is called a “cation,” and has a positive charge. “Cations” are usually metallic atoms and “anions”

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    Properties of Ionic and Covalent Bonds Explained Within the last unit of Chemistry, the cause of ionic and covalent properties was revealed. The true predictor of the compound lies in the bonds that take place. Normally within an ionic bond there is a non-metal and a metal element bonded together. During the bonding elements completely transfer valence electrons between atoms. The metal within the bond loses the few electrons that it has in the outer-most shell which then causes the metal to

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    Introduction to Ionic Liquids Ionic liquids (ILs) are liquids composed entirely of ions. Molten salt is the term normally reserved for those systems that are liquid at high temperatures, for example NaCl (table salt is a liquid at ≈ 800 0C). Room-temperature ILs are liquid below 100˚C, have received considerable attention as substitutes for volatile organic solvents. Due to their remarkable properties, such as negligible vapour pressure, large liquidous range, high thermal stability, good ionic conductivity

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    become oxidized by the persulphate ion. Our general reaction can be described as: (NH4)2S2O8 + 2KI à I2 + (NH4)2SO4 + K2SO4 (1a) However, we know that in an aqueous solution, all of these compounds except iodine will dissociate into their ionic components. Thus we can rewrite the equation in a more convenient manner: S2O82- + 2I- à I2 + 2SO42- (1b) It is important however to note that the NH4 and K ions are still in the solution, they are just unreactive. In order to measure the

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    Chromatography

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    due to differences in adsorption, ionic strength, polarity or size. These differences allow the mixture components to be separated from each other by using these differences to determine the transit time of the solutes through a column. Simple liquid chromatography consists of a column with a fritted bottom that holds a stationary phase in equilibrium with a solvent. Typical stationary phases (and their interactions with solutes) are: solids (adsorption), ionic groups on a resin (ion-exchange), liquids

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    the hydrogen ion concentration, the lower the pH. Most enzymes function efficiently over a narrow pH range. A change in pH above or below this range reduces the rate of enzyme reaction considerably. Changes in pH lead to the breaking of the ionic bonds that hold the tertiary structure of the enzyme in place. The enzyme begins to lose its functional shape, particularly the shape of the active site, such that the substrate will no longer fit into it, the enzyme is said to be denatured. Also

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