Purpose Determine which kinds of reactions involve electron transfer as the driving force. Background Redox (reduction-oxidation) reactions include all chemical reactions in which atoms have their oxidation state changed. So‚ when a metal and a nonmetal react‚ there is an ionic bond formed‚ which means one of them loses electrons while the other gains them. Since this reaction involves the exchange of electrons it is termed as a redox reaction. The oxidation states in a metal- nonmetal are simple
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This article was downloaded by: [78.39.229.183] On: 10 March 2013‚ At: 06:52 Publisher: Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office: Mortimer House‚ 37-41 Mortimer Street‚ London W1T 3JH‚ UK Polymer-Plastics Technology and Engineering Publication details‚ including instructions for authors and subscription information: http://www.tandfonline.com/loi/lpte20 Thermal‚ Dynamic Mechanical‚ and Barrier Studies of Potassium Permanganate-LDPE
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concentration of KMnO4 from the solution created by the stockroom. 16H+ + 2MnO4- (aq) + 5C2O42- (aq) → 2Mn2+ (aq) + 10CO2 (g) + 8H2O (l) Volume of potassium manganate (KMnO4) = 32.5 mL Mass of Sodium Oxalate (NaC2O4): 0.104 [KMnO4] Calculation: = (0.104g of NaC2O4)(1 mol NaC2O4 /134.0g)(2 mol KMnO4 / 5 mol NaC2O4)(1/32.5 mL)(1000 mL /1L) = 0.00955 M KMnO4 2. Using the standardized concentration of KMnO4 calculated above to find the mass percentage of the oxalate ion Equation: Volume of KMnO4 reacted
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slightly more KMnO4‚ and therefore slightly less H2O2 Materials and Methods The materials and methods we used were supplied by the teacher. Results Part A: As the 1 mL of fresh catalase solution was added to the 10 mL of the 1.5% H2O2 solution bubbles formed. When we transferred the 1 mL of boiled and then cooled catalase extract to 10 mL of 1.5% H2O2 it became cloudy. Part B: It took 4.5 mL of KMnO4 to titrate the H2O2 in the solution. The readings for the amount of KMnO4 used in titration
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pressure increases. Links to: The Kinetic Theory of Matter Why the Temperature of a Gas Increases when it is Compressed Distribution of Molecular Speeds Thermal Physics Chapters Index Return to top of page synthesis of potassium permanganate (KMnO4)‚ a common chemical. Occasionally‚ potassium manganate and potassium permanganate are confused‚ but they are different compounds with distinctly different properties. Contents [hide] 1 Structure 2 Synthesis 3 Reactions 4 Literature cited
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the experiment was a 99.5% purity for the anhydrous iron (II) ammonium sulfate. Introduction: In this experiment‚ oxidation/reduction (or redox) will be used in the titration analysis of an iron compound. We will use potassium permanganate‚ KMnO4‚ as the titrant in the analysis of an unknown sample containing iron to determine the percent iron by mass in the sample. In acidic solution‚ potassium permanganate rapidly and quantitively oxidizes iron(II) to iron (III)‚ while itself being reduced
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Comparison of Three Isomers of Butanol Pre-lab: 1. Write the general reaction of an alcohol and HCl. 2. What would the solubility be of an alcohol in water. 3. What would the solubility be of an alkyl halide in water? 4. What is the purpose of KMnO4 in the reactions? Safety: Concentrated hydrochloric acid is corrosive and the vapour is very irritating to the respiratory system. Avoid contact with skin‚ eyes‚ clothing‚ and the lab bench. Wear eye protection and a lab apron. All three alcohols
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oxygen in the water. If acid isn’t added the solution will quickly start to turn yellow due to formation of MnO2. If this happens anyway‚ add some more sulphuric acid to reverse the process. The solution should be clear with a slight green tinge. Chapter 15 – Volumetric analysis (Redox titrations) To prepare a standard solution of ammonium iron sulphate and use this solution to standardise a solution of potassium permanganate. Potassium permanganate (KMnO 4 ) is a powerful oxidizing agent and is
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evenly diffused through the solution. 2. Repeat step 1‚ but this time put 4 ml of potassium permanganate and 3 ml of distilled water instead into the 2nd test tube. Keep repeating step 1‚ with 4ml(KMnO4) and 3ml(H2O)‚ 3ml(KMnO4) and 4ml(H2O)‚ 2ml(KMnO4) and 5ml(H2O)‚ 1ml(KMnO4) and 6ml(H2O)‚ 0.5ml(KMnO4) and 6.5ml(H2O). Place these solutions in separate test tubes and arrange the solutions in chronological order with descending concentration. 3. Label each test tube so they don’t get mixed up. 4
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In a test between Potassium Manganate (VII) and an unknown organic solution‚ the solution turned from pink to dark red. Does anyone know which functional group would be present in solution? Potassium Magante is K2MnO4 whereas the permanganate is KMnO4‚ in the second one the Mn as a higher oxidation state of +7‚ the other one just +6. It would show that a double bond is present. (It oxides the alkene to a diol‚ which changes the oxidation state of the Mn changing it’s colour) Original post by
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