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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KINETICS OF THE ACID DECOMPOSITION OF THIOSULFATE Aqueous solutions of thiosulfate‚ S2O32-(aq) are stable if neutral or basic‚ but decompose quickly when the thiosulfate is dissolved in acid according to the equation: Sulfur dioxide is a gas at room temperature‚ but is very soluble in water. Sulfur‚ a water insoluble solid‚ forms a colloidal suspension. As a result‚ the solution first becomes cloudy and then opaque. We can take advantage of the developing opacity of the reaction system to do a
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3/4/14 Determining The Formula of a Complex Ion Luqman Khan Contents: Aim………………………………………………………………………………………………………………….……2 Results……………………………………………………………………………………….………………………2-6 - Raw Data………………………….………….……………………………………………………..…..2 - Qualitative Analysis………………………………………………………………………………….2 - Data Processing……………………………..……………………………………………………..3-5 - Graphical Results……………………………..…………………………………………….…….5-6 Conclusion…………………………………………………………………………………………………………6-7 Evaluation……………………………………………………………………………………………………………
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The Iron Maiden: Michael Graves and the Trap “Those who love too much lose everything; those who love with irony‚ last.” Hephaistion [The Persian Warrior]‚ Alexander (Oliver Stone‚ 2004) Post-modernism in the 1980s has‚ without any doubt‚ had a lasting impact on architecture today. It is a strand of architectural thought has continued to be expanded and developed even after it’s prominence in the 1980s. Definitions of the “post-modern” are often ephemeral‚ post-modernism
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A Case of Iron Deficiency (Summarizing and Note-Taking) Describe the structure of a molecule of hemoglobin and explain the role played by iron in the transport of oxygen. The structure of hemoglobin is a hemi group. A hemi group consists of an iron (Fe) ion held in a heterocyclic ring. Iron binds with oxygen. Therefore‚ it has a very important role in transporting oxygen in the blood. How is iron stored and transported in the body? Iron can be stored within intestinal entrecotes bound to ferritin
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Lab Report A Mole Lab That Actually Works! Conducted by: Tyler Bishop and Erica Bowman 2nd Period April 27th 2015 Ashland County West Holmes Career Center Mrs. Bender 1 Background Iron powder will react with cupric sulfate in a onetoone ratio (1 mole to 1 mole). The students will also be able to more easily visualize the size of a mole of iron and copper. The result obtained in this lab usually have less than a one percent error. Fe(s) + CuSO4 (aq)
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Recrystallize with 2 mL of EtOH 10. Filter pure product and collect MP and mass 11. Perform a saturation test with a bromine and potassium permanganate solution 12. Obtain NMR from instructor and identify peaks Apparatus: Post Lab: Observations:
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Subject: Chemistry SL Title: Preparation of a salt (lead iodide) by using precipitation method. Aim: To produce 1.50 g of lead iodide‚ PbI2‚ assuming 100 % conversion‚ using 1.00 g solid potassium iodide‚ KI‚ and 0.1 M lead nitrate‚ Pb(NO3)2 solution of volume 30 cm3 and hence calculate percentage yield. Calculations: 2KI(s) + Pb(NO3)2( aq) —> PbI2 (s) + 2KNO3 (aq) Mass of PbI2 to be produced = 1.5 g Moles of PbI2 = = 0.003 Moles of KI = 0.003*2 = 0.006 Mass of KI = 0.006*166 = 1.00 g
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around 15mins. After first centrifuge the solution came out pale orange. The second heat and centrifuge produced very little precipitate. |The orange colour in the solution may indicate a presence of Cadmium (Cd2+) Most of the Group 2 ions in solution were precipitated out in reaction. Nearly complete reaction was obtained. | |2-3 Separation and Detection of Bismuth |After heating with HNO3 added a yellow gelatinous substance appeared. After NH3 was added to create a basic solution
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Use the postulates of the kinetic theory to explain the following: i)Matter can exist in three states ii)The pressure exerted by a confined gas decreases as its temperature is lowered iii)A gas of low molecular mass will diffuse through air faster than a gas of high molecular masseven though both are at same temperature. The Kinetic Theory can be used to describe the three physical states of matter namely‚ solid‚ liquid and gas. In this theory‚ some basic assumptions has to be made: a) all matter
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