non-polar solvents by mixing polar and non-polar solutions in test tubes. Material: • Lab coats and safety spectacles • A fume cupboard • Heptane • Water • Potassium Permanganate • Iodine • 2 test tubes • 4 small flasks Method: (Wear safety specs and lab coats) • Prepare 4 small flasks containing: • A Heptane • B A weak solution of potassium permanganate‚ made by putting a few crystals of KMnO4 in 100 ml of water. Dilute this with more water until it is the same colour as D • C Water • D Iodine in heptane
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standard solutions: potassium permanganate‚ KMnO4 potassium dichromate‚ K2Cr2O7 iodine‚ I2 ceric sulfate‚ Ce(SO4) 2 potassium iodate‚ KIO3 REDOX TITRATION • reducing agents used as standard solutions: ferrous sulfate‚ FeSO4 oxalic acid‚ H2C2O4 sodium oxalate‚ Na2C2O4 sodium thiosulfate‚ Na2S2O3 titanous chloride‚ TiCl2 REDOX TITRATION • important redox titration combinations: potassium permanganate and ferrous salts potassium dichromate and ferrous
Free Titration Potassium permanganate Oxidizing agent
Aromatic hydrocarbons are cyclic compounds whose structure is related to that of benzene‚ with six -electrons in a six-member ring. Aliphatic Hydrocarbons such as Alkanes are relatively inert to chemical oxidizing agents such as neutral or alkaline permanganate‚ where alkenes are readily oxidized at room temperature. The change in color can be used as a test for a double bond‚ provided the molecule contains no easily oxidizable group. Aromatic Hydrocarbons such as toluene will be used in each of the
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1. Determining the 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:
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of bromine water. No colour change | Alkene present | Reaction with aqueous potassium permanganate Test | Observation | Inference | 2ml of cyclohexane + 2 dropsKMnO4 + shaking | No colour change with the addition of aqueous KMnO4 | Presence of Alkane | 2ml of cyclohexene + 2 dropsKMnO4 + shaking | Colour changes to colourless with brown precipitate | Presence of Alkene | Reaction with potassium permanganate and aromatic compound Test | Observation | Inference | 1ml of
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solute/solvent/solution used during the experiment. Name Concentration (%) Volume (ml) Qualitative Observations Glucose (C6H12O6) 5 different types: 4%‚8%‚12%‚16%‚20% 5.0 ± 0.1 ml Clear‚ Colourless Name Concentration (M) Volume (ml) Qualitative Observations Potassium Permanganate (KMnO4) 0.010 M 1.00 ± 0.05 ml Intensely pink/purple Sulphuric Acid (H2SO4) 1 M 5.0 ± 0.1 ml Clear‚ Colourless Data Collection:- Table: 2- Shows the concentration of glucose solution (%) and the total time taken (s) by the solution
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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 acid to
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iron(II) salt in an unknown sample. We performed titrations using Potassium permanganate which is a strong oxidizing agent‚ with unknown sample dissolved in deionized water. The result of 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
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formation of a white ring around the glass closer to the side of the heavier substance (HCl‚ M = 36.4611 g/mole; dAve = 10.8 cm). The agar-water gel set up was composed of a petri dish of agar-water gel containing three wells. Drops of potassium permanganate (KMnO4)‚ potassium dichromate (K2Cr2O7) and methylene blue were simultaneously introduced to each well. Methylene blue‚ having the largest molecular weight‚ displayed the smallest diameter (18 mm) and diffused at the slowest rate (0.3668 mm/min.). Thus
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of the tube containing HCL with a large molecular weight. In agar-water gel test‚ using agar plate and agar-water gel‚ 2 different substrate were tested- potassium permanganate (KMnO4) and methylene blue (C16H18N3SCl). By dropping it on a agar plate‚ methylene blue has a slowest diffusion rate and large molecular weight than potassium permanganate. Thus‚ the greater the molecular weight‚ lesser the rate of diffusion. INTRODUCTION Diffusion is a passive transport. It is results from
Free Diffusion Molecular diffusion Potassium permanganate