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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dissolved in water to give 2.0 102 mL of solution. The concentration of the solution is: a) 1.0 M b) 3.0 M c) 0.10 M d) 5.0 M e) 10.0 M Ans: d) 5.0 M Page: 4.3 2. Which of the following aqueous solutions contains the greatest number of ions? a) 400.0 mL of 0.10 M NaCl b) 300.0 mL of 0.10 M CaCl2 c) 200.0 mL of 0.10 M FeCl3 d) 200.0 mL of 0.10 M KBr e) 800.0 mL of 0.10 M sucrose ANS: b) 300.0 mL of 0.10 M CaCl2 PAGE: 4.3 3. What mass of calcium chloride‚ CaCl2‚ is needed
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than titrating directly with standard iodide‚ because a high concentration of I- is needed to form the I3- complex. In this type of analysis‚ excess iodide is added to the oxidizing agent‚ and the triiodine is titrated with stand thiosulfate. This indirect analysis finds the number of moles of ascorbic acid based on the known number of moles of IO3- and subtracting half the amount of moles of the thiosulfate solution. II: Equations: Iodate with Iodide: IO3- + 8I- + 6H+ 3I3- + 3H2O Thiosulfate
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concentration of aqueous copper(II) sulfate by titration. The concentration of Cu2+ ions in a solution can be found by reaction with an excess of aqueous iodide ions to produce iodine. The amount of iodine formed can be found by titration with thiosulfate ions‚ S2O32–. For Examiner’s Use FB 1 is aqueous copper(II) sulfate‚ CuSO4. FB 2 is 0.100 mol dm–3 sodium thiosulfate‚ Na2S2O3. FB 3 is aqueous potassium iodide‚ KI. starch indicator Read through the instructions carefully before starting
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Atoms‚ Airs‚ and Chemical Bonding Rich McConnell‚ CH-201 Grantham University Atoms‚ Airs‚ and Chemical Bonding 1. Alcohol in our digestive system reacts with oxygen gas to form carbon dioxide and water. How many grams of carbon dioxide are released if a 10.00 g alcohol sample reacts with 20.85 g of oxygen gas and produces 11.77 g of water? Answer: 19.08g CO2 2. Using the periodic table‚ fill in the missing information in the following table: Protons Neutrons Electrons Isotope Symbol 27 32 27
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LESSON PLAN FOR III-PEARL (CHEMISTRY) FORMULA WRITING AND NAMING OF COMPOUNDS OBJECTIVES: (1) Classify ions according to their composition‚ charge‚ and oxidation number (2) Define chemical formula (3) Explain the importance of representing ions‚ elements and compounds using chemical formulas (4) Write and name chemical formulas of compounds using the Stock System and Classical System MATERIALS: power point presentation videos flashcards textbook
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together 31. Prepare the solution to be analyzed by placing it in a clean Erlenmeyer flask or beaker 32. Dissolve a single tablet in 500 mL of distilled water in a conical flask and add about 150 mL of distilled water‚ 5 mL of 0.6 mol L−1 potassium iodide‚ 5 mL of 1 molL−1 hydrochloric acid and 1 mL of starch indicator Solution. 33. Use the buret to deliver a stream of titrant to within a couple of mL of your expected endpoint. 34. Use a wash bottle to rinse the sides of the flask and the tip of the
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of valence electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions (Larsen‚ 2010). Element that have a positive ion are able to bond with elements with negative ions. This is because the elements share the electrons so that the ionization becomes neutral and both atoms become stable. Materials: 1. Cards with elements and positive or negative ions. 2. Reference Tables for Physical Setting/CHEMISTRY 2011 Edition: Periodic Table of the Elements 3. Bond
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monochloride solution from a burette and mix. Then add about 5 mL of a 2.5% solution of mercuric acetate in glacial acetic acid‚ which will act to catalyse the reaction. Insert the stopper which has been previously moistened with a solution of potassium iodide. Keep in a dark place for 3 minutes to allow the unsaturated fatty acid residues of the
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NITROSYL CHLORIDE 657 NITROSYL CHLORIDE [2696-92-6] Formula: ClNO; MW 65.459 Structure: Cl—N=O. bent molecule‚ N—O bond distance 1.139Å and N—Cl bond distance 1.975Å Uses Nitrosyl chloride is an important component of aqua regia. It is an oxidizing agent in organic synthesis. It also is used as a catalyst. Physical Properties Yellow gas; heavier than air‚ density 2.3 (air=1); gas density 2.872 g/L; liquefies at –5.55°C; liquid density 1.273 g/mL; freezes at –59.4°C; critical temperature 167°C;
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