of a Mn(III) complex of actylacetone which is a useful starting material for the preparation of other Mn(III) compounds. Manganese(III) complexes are relatively stable. In this experiment a solution of manganese(II) chloride was oxidized with potassium permanganate in the presence of acetylacetone giving the brown acetylacetonemanganese(III)‚ Mn(acac)3. Since‚ the ground state for the octahedral complexes like that of Mn(acac)3 is a 5Eg (t2g3 eg1) Suggests the presence of Jahn-Teller distortion
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oxidation-reduction reaction between analyte and titrant (Harris‚2009). It involves the transfer of electrons between the two solutions. This experiment aims to determine the amount of iron or iron content of a razor blade by redox titration using potassium permanganate as a titrant and a self-indicating agent. Blank titration is used to estimate the titration error. Proper techniques and calculation regarding blank titration is also shown. This experiment will help the students to learn the proper
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LE CHATELIER’S PRINCIPLE Castro‚ Lharize C. Experiment # 1 I. Introduction: In this experiment‚ using Le Chatelier’s principle‚ we will observe several responses of a system at equilibrium to various changes in external conditions. The experiment aims to investigate two equilibrium systems: (a) cobalt complexes and (b) chromate-dichromate equilibrium and explain observations in light of the Le Chatelier’s principle. II. Theory/Concepts: In 1884 the French chemist and engineer Henry-Louis
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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 any practical work.
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formula of the compound? A. CH2O B. CH4O C. C2H4O D. C2H4O2 2. What is the total number of atoms in 0.20 mol of propanone‚ CH3COCH3? a. 1.2×1022 b. 6.0×102 C. 1.2×1024 D. 6.0×1024 Assuming complete reaction‚ what volume of 0.200 mol dm–3 potassium hydroxide solution (KOH(aq))‚ is required to neutralize 25.0 cm3 of 0.200 mol dm–3 aqueous sulfuric acid‚ (H2SO4(aq))? A. 12.5 cm3 B. 25.0 cm3 C. 50.0 cm3 D. 75.0 cm3 4. The temperature in Kelvin of 1.0 dm3 of an ideal gas is doubled and its
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certain colors which will help us to figure out which element it is. Materials: Safety goggles Matches Weighing dishes‚ 6 Watch Glasses‚ 6 Wooden Splints‚ 6 Water‚ 250 mL Alcohol‚ 5 mL Calcium Chloride Copper Chloride Lithium Chloride Potassium Chloride Sodium Chloride Strontium Chloride Procedure: 1. Put on safety goggles 2. Wear gloves when handling chemicals 3. Obtain a 250 – mL beaker half-full with water. Obtain 6 wooden splints 4. Obtain six weighing dishes labeled
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References: Crouch‚ S.‚ Holler‚ F.‚ Skoog‚ D. & West‚ D. (8th ed.) (2004). Fundamentals of Analytical Chemistry. (pp. 786-787‚ 796-797). Nelson Education Ltd. • Starna Cells. (n.d.). Potassium Dichromate Reference: For assessing the absorbance scale of your UV spectrophotometer. Retrieved March 17‚ 2011 from file:///F:/Analytical%20Chemistry/PDC.html
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Lab 22: 4-Methylcyclohexene Abstract: We treated 4-methylcyclohexanol with phosphoric acid‚ and after purification we produced the end product 4-methylcyclohexene. We determined we had a pure product based on the results of the tests with Br2 and KMnO4‚ as well as the IR absorbtion spectrum of the final product. Purpose: The purpose of this experiment is to obtain pure 4-methylcyclohexene by reacting 4-methylcyclohexanol and phosphoric acid. Through distillation
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Burner Test tube Clamp Pneumatic trough Stand Procedure 1. Weigh a test tube (18 X 150 mm) to the nearest 0.01 g. 2. Add about 1 g of manganese dioxide (MnO2) to the test tube and reweigh to the nearest 0.01 g. 3. Weigh out exactly 1.50 g of potassium chlorate (KClO3) and add it to the test tube. Mix the MnO2 and KClO
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Analytical Chemistry Daniel C. Harris: 7-4‚ 8‚10‚12‚16 7-4) A 1.000g sample of unknown analyzed by Reaction 7-2 gave 2.500g of bis(dimethylglyoximate) nickel(II). Find the wt% of Ni in the unknown. 7-8) The man in the vat. Once upon a time‚ a workman at a dye factory fell into a vat containing a hot concentrated mixture of sulfuric and nitric acids‚ and he dissolved! Because nobody witnessed the accident‚ it was necessary to prove that he fell in so that the man’s wife could collect his insurance
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