The Ionic mechanism and propagation of action potentials. The action potential is the result of a large‚ sudden increase in sodium permeability of the membrane. The resulting rush of sodium ions into the membrane and accumulation of positive charge on its inner surface drives the potential towards Ena. This is followed by repolarisation‚ whereby there is a large increase in the membranes permeability to potassium ions‚ hence the membrane returns to Ek. Explanation of the (ionic) mechanisms underlying
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Professor Tolentino Maria Oyervide EXPERIMENT #4 IONIC AND COVALENT COMPOUNDS Abstract: This experiment was divided in four steps to find the electrical conductivity of covalent and ionic solutions. There were four unknown solutes A‚ B and C. Each had a specific weight and was dissolved in a certain amount of solute to form either the covalent or ionic solution. Covalent compounds are made up of molecules which are electrically neutral. Ionic compounds are composed of ions‚ which are positively
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Chemistry December 14‚ 2010 Conductivity of Ionic solutions Introduction This lab report is about the conductivity of ionic solutions. In class we have been discussing wether all ionic solutions conduct equally well. If an solvent solution conducts electricity‚ then it must contain ions. So measuring the conductance of solutions can tell you whether the solutes in the solution are dissociated into ions. (Conductivity) Any type of solution‚ even ionic solutions‚ provide resistance to the flow of
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The purpose of this experiment was to observe the hypothesized correlation between ionic strength and degree of ionization of a weak acid‚ while determining the factors that would impact the degree of ionization using measurements of pH. It was initially required to prepare standard 20-mL solutions of varying concentration of acetic acid for use in the rest of the experiment. One solution of CH3COOH was supposedly developed to be 2.00M‚ however it is highly possible that the solutions of CH3COOH
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Solubility in Ionic Liquids Mark J. Muldoon‚† Sudhir N. V. K. Aki‚‡ Jessica L. Anderson‚ JaNeille K. Dixon‚ and Joan F. Brennecke* Department of Chemical and Biomolecular Engineering‚ UniVersity of Notre Dame‚ Notre Dame‚ Indiana 46556 ReceiVed: March 8‚ 2007; In Final Form: May 4‚ 2007 Previously we showed that CO2 could be used to extract organic molecules from ionic liquids without contamination of the ionic liquid. Consequently a number of other groups demonstrated that ionic liquid/CO2
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type of compound usually has higher melting points‚ ionic compounds or covalent compounds? What is the reason for this difference in melting points? (3 points) Ionic compounds usually have higher melting points. This is because the atoms of covalent compounds are bound strongly to each other in stable molecules‚ but those molecules are in general not very strongly attracted to other molecules in the compound. On the other hand‚ the atoms in ionic compounds show strong attractions to other ions in
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theoretical chemical equations of ionic compounds were balanced by the group to determine ratios of reactants and products. The products were determined by the group through switching the cation with their anion partner. Using this information‚ it was determined by the group‚ whether the reaction should result in a solid‚ gas‚ or water based on theoretical solubility. Then several experiments testing the reaction of these ionic compounds were performed by the partners. Two ionic compounds were mixed together
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Differences Between Ionic and Covalent Compounds Abstract In chemistry‚ a compound is a substance formed from two or more elements‚ with a fixed ratio determining the composition. A defining characteristic of a compound is that it has a chemical formula. Formulas describe the ratio of numbers of atoms in a substance. Compounds may have a number of possible phases. For a compound to be a liquid or a gas and still be called a compound‚ atoms from the various elements must be stuck together in
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primary objective. The experiment was divided into two parts‚ first‚ mixing two aqueous solutions of ionic compounds. The second part involved the observance of heating and combustion reactions‚ using the supplied solid elements and compounds. Experiment and Observations: The first part of this experiment involved mixing the compounds‚ provided by Hands-On Lab‚ in a 24-well plate. Aqueous solutions of ionic compounds were mixed in eight separate wells. A few drops of each solution were mixed in a well
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Student Name: Melissa Tatum Student ID: 4593119 Date: 7 Dec 2014 Course and Section Number: SCIN131 A004 Fall 14 Lesson 4 Lab: Chromatography and Ionic versus Covalent Bonds PART 1 Begin by viewing the following Thinkwell video 15.1.3 CIA Demonstration: Chromatography After you watch the above video‚ answer the questions below in sufficient detail: (a) (3 pts.) This video discusses 3 different types of chromatography. List each one mentioned‚ and describe their differences in as much detail
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