Reactions of some Hydrocarbons Equipment Required: -4 Test tubes -Dropper - Cyclohexane (C6H12) (3ml) - Cyclohexene (C6H10) (3ml) - Toluene (CH3C6H5) (3ml) - Potassium Permanganate solution (KMnO4) .01 mol L-1 (4ml) - Sulfuric Acid (H2SO4) 2mol L-1 (2ml) - Bromine Water (Br2) (5ml) Procedure: Reaction of hydrocarbons with acidified permanganate: 1) Into three separate‚ labeled test tubes place 1 ml of cyclohexane‚ cyclohexene and toluene respectively. 2) In a separate test
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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
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partially balance the equation: NH3OH+ + 2Fe+3 "" ? + 2Fe+2 and to find the missing product. Procedure: H2C2O4 and H2SO4 were titrated with potassium permanganate. The molarity of the permanganate was then found because the molarity of the H2C2O4 and H2SO4 were already known. Then hydroxylammonium chloride and ferric sulfate and water was titrated with known potassium permanganate to get the molarity of the hydroxylammonium chloride and ferric sulfate solution‚ and that was used to find the number of
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volumetric analysis: Redox titration. • To review the stoichiometry of an oxidation- reduction reaction. • To determine the concentration of an unknown sodium oxalate (Na2C2O4) solution by titrating it against standardized potassium permanganate solution (KMnO4). • To determine the percent by mass of Fe(II) in the form of ferrous ammonium sulfate Fe(NH4)2(SO4)2.6H2O in a mixture by redox titration. B. Theory: (electron transfer reactions) 2Mg (s) + O2 (g)
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Freezing Point of water the greatest amount. *PROBLEM: Which type of salt lowers the Freezing Point of water to the lowest point? Blank 2 *HYPOTHESIS: The KCl will lower the water’s Freezing Point the most‚ because Potassium has the lowest ionization energy out of the five metals that are bonded with Chlorine‚ and perhaps it will bond more easily with the water molecules‚ keeping it from freezing. *MATERIALS: *Power Macintosh or Windows PC *10-ml graduated cylinder
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The Cr (VI) present in potassium dichromate will be determined using direct visible spectrophotometry. The calibration process is employed in this experiment since it is essential in every analytical procedure. The external calibration method will be done in the experiment. II. Objectives a. To determine the wavelength with maximum absorbance of chromium (VI) specie. b. To calculate the molar absorptivity of the different concentrations of potassium dichromate by applying the
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Standardize a solution of potassium manganate(VII) by an iron (II) salt (ammonium iron (II) sulphate) Introduction Oxidation numbers describe the number of electrons the atom will gain or lose during a reaction. Each atom in an equation can be assigned an oxidation number according to certain rules. If the oxidation number of an atom increases as you go from the left side to the right side if an equation‚ oxidation has occurred (electrons have been lost); if the oxidation number decreases
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Decolourisation 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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Aim To prepare a standard iron (II) solution To determine the concentration of potassium permanganate solution Instructions Preparation of Standard Iron (II) Solution 8g of hydrated iron (II) ammonium sulfate is weighed accurately using a 50mL beaker. The salt is transferred to a 250mL volumetric flask using a filter funnel‚ washed down with distilled water. The container is rinsed carefully and the rinsing is added to the volumetric flask. 100mL of water is added slowly to the volumetric
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produced with the nitrogen so the potassium nitrate adapts with the sodium to make the hazardous sodium oxide less harmless. The uses of the stoichiometry cffffffffffffffffffffffffffffffffffeeeeer bags are located inside automobiles. The air bag is in front of the passenger seat inside the dashboard. Once the vehicle gets into a crash the air bag pops out. The air bags are filled nitrogen gas. Hazardous sodium metal is also produced with the nitrogen so the potassium nitrate adapts with the sodium to
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