HCl. The next test was the agar-water gel test. It was composed of a petri dish of agar-water gel with three wells. A drop of potassium permanganate‚ potassium dichromate‚ and methylene blue were introduced to the three wells simultaneously. The diameters of the three substances were measured after a regular 3 minute interval for 30 minutes. Results showed that potassium permanganate‚ which is the lightest‚ have the fastest diffusion rate while methylene blue‚ the heaviest‚ have the slowest diffusion
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secondary‚ and tertiary alcohols with acid and with an oxidizing agent. Materials chemical safety goggles lab apron protective gloves test-tube rack eyedropper dropper bottles containing butan-1-ol butan-2-ol 2-methylpropan-2-ol potassium permanganate solution‚ KMnO4 (aq) (0.01 mol/L) concentrated hydrochloric acid‚ HCl (aq) (12 mol/L) (for teacher use only) Procedure 1) Put on your safety goggles‚ apron‚ and protective gloves. 2) Put 3 test tubes in a test-tube rack. From
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Discussion Potassium permanganate‚ KMnO4‚ is widely used as an oxidizing agent in volumetric analysis. In acid solution‚ MnO4- ion undergoes reduction to Mn2+ ion as shown in the equation: 8 H+(aq) + MnO4-(aq) + 5e- → Mn2+(aq) + 4 H2O(l). Since the MnO4- ion is violet and the Mn2+ ion is nearly colorless‚ the end point in titrations using MnO4- as the titrant can be taken as the first permanent pink color that appears in the solution being titrated.1 The number of moles of potassium permanganate
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Fat and Oil 1.Abstract Saponification value is expressed by potassium hydroxide in mg required to saponify one (1) gram of fat. It depends on the kind of fatty acid contained in the fat. Measurement of saponification value is performed according to the below listed official test methods. Here we test a sample of fatty acid. The sample is first saponified by adding 0.5mol/L potassium hydroxide ethanol‚ and then the excessive potassium hydroxide is titrated with 0.5mol/L hydrochloric acid until the
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of hydrogen peroxide in a consumer product? Design: An acidic solution of primary standard‚ iron (II) ammonium sulfate-water (1/6)‚ is prepared and the potassium permanganate standard. A 25.0 mL sample of a consumer solution of hydrogen peroxide is diluted to 1.00 L with water (that is‚ it is diluted by a factor of 40). The standardized potassium permanganate solution is used to titrate the diluted and acidified hydrogen peroxide. The amount concentration of the original hydrogen peroxide is obtained
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Noah Stewart-Maddox Chem 121 10/12/11 Synthesis of Potassium Ferric Oxalate Trihydrate and The Determination of Oxalate Ion in Ferric Oxalate Trihydrate using Titrimetry Abstract: In this two-part lab‚ we will learn about coordination compounds and their uses with stoiciometry. We will also find out about how theoretical yield is calculated from a reaction we will create. We will also synthesize Potassium Ferric Oxalate Trihydrate (K_3 [〖Fe(C_2 O_4)〗_3]•3H_2 O) using a two step reaction. In
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EXPERIMENT 8 – Reactions of Hydrocarbons Properties and Identification of Hydrocarbons Purpose: a) To identify saturated and unsaturated hydrocarbons using properties and reactions. b) Study substitution and addition reactions. Equipments test tube rack (1) test tube holder (2) 100 mL beaker medium test
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The cyclohexane that react with bromine under present of UV light will change to slightly brown while the other one has no changeous which is still brown.For baeyer’s test‚the alkane which is heptanes will not undergo the oxidation reaction with potassium permanganate due to saturate bond .Thus‚will forming two layer will form which the solution does not mix.While on the other hand‚2-pentene will react with sulphuric acid to form penta-2‚3-diol.The purple color of KmnO4 will change to brown CH3CH=CHCH2CH3
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Standardization of KMnO4 Solution: I weighed out about 2.8 grams of potassium permanganate and dissolved it in about 200 ml of distilled water. I made sure to make all of the permanganate dissolve‚ of course‚ by stirring it thoroughly. I then weighed about 2 samples of sodium oxalate (.47 and .50 g) then placed them in some 200-ml Erlenmeyer flasks‚ then and added about 50 ml of distilled water to them as well. I then titrated the potassium permanganate solution after adding about 15 ml of 3 M sulfuric
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the oxidation numbers for sulfur in the species below. S2O32– (ii) S SO2 . Assessor’s use only Write balanced half-equations for the oxidation and reduction reactions. Oxidation Reduction (b) Oxalic acid (H2C2O4) reacts with acidified potassium permanganate solution (MnO4– / H+). (i) Describe what would be observed. (ii) Write balanced half-equations for the oxidation and reduction reactions‚ and then write a balanced equation for the overall reaction. half-equation half-equation
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