agent used is alkaline potassium permanganate (VII). Benzyl alcohol is refluxed with potassium permanganate in water. The mixture is hot filtered to remove manganese dioxide and then allowed to cool. Reaction between the alcohol with the oxidizing agent will produce sodium salt (i.e sodium benzoate)‚ which on acidification with hydrochloric acid will produce benzoic acid. Objective To prepare benzoic acid from benzyl alcohol. Materials Sodium hydroxide‚ potassium permanganate‚ benzyl alcohol‚ concentrated
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diffusion rates of Potassium permanganate (KMnO4)‚ Potassium dichromate(K2Cr2O7) and Methylene Blue^1 _________________ Group 3 Sec. X-1L February 6‚ 2012 ____________________ ABSTRACT The effect of molecular weight on the diffusion of substances were tested through the use of agar-water gel with three wells placed in a petri dish. Drops of three different substances namely: Potassium permanganate (KMnO4)‚ Potassium dichromate
Free Diffusion Molecular diffusion Ammonia
time taken for the potassium permanganate to decolourise from purple to colourless ? HYPOTHESIS The higher the glucose concentration the shorter the time taken for the potassium permanganate to decolourise from purple to colourless. VARIABLES VARIABLE | UNITS | RANGE | METHOD FOR CONTROL | INDEPENDENT VARIABLE-Concentration of glucose solution | % | 5%10%15%20%25%30% | Different glucose concentration are tested | DEPENDENT VARIABLE-The time taken for the potassium permanganate to decolourise from
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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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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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the Diffusion Rate of Potassium Permanganate‚ Potassium Dichromate‚ and Methylene Blue.1 Arantxa Alex Carpio Group 1 Sec. X – 4L March 24‚ 2015 ABSTRACT The effect of molecular weight and time on the rate of diffusion was determined using the agar-water gel test. A petri dish of agar-water gel with three wells was prepared and a prepared solution of each substance was dropped on each well; one with potassium permanganate (KMnO4)‚ the other with potassium dichromate (K2Cr2O7)
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titration is just complete Indicator It is a substance which will show the end point of the reaction by change of colour. For example phenolphthalein and methyl orange are indicators used in acid alkali titrations. Potassium permanganate itself acts as an indicator in potassium permanganate titrations. Acidimetry and Alkalimetry Titration: Acidimentry refers to the titration of alkali with a standard acid and alkalimetry refers to the titration of an acid with a standard alkali. 123 Permanganimetry
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30 mL of sulfuric acid to about 1020 mL of water‚ allow to cool to 25‚ and determine the normality by titration against tromethamine as described under Hydrochloric Acid‚ Normal (1 N). Potassium Permanganate‚ Tenth-Normal (0.1 N) KMnO4‚ 158.03 3.161 g in 1000 mL Dissolve about 3.3 g of potassium permanganate in 1000 mL of water in a flask‚ and boil the solution for about 15 minutes. Insert the stopper in the flask‚ allow it to stand for at least 2 days‚ and filter through a fine-porosity‚ sintered-glass
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Butan-2-ol 2-methylpropan-2-ol Potassium permanganate solution‚ KMnO4(aq) (0.01 mol/L) Concentrated hydrochloric acid‚ HCl(aq) (12 mol/L) *Alcohols are flammable and should be kept away for heat sources or sources of ignition. They also should be used in a well-ventilated area. *Concentrated hydrochloric acid is very corrosive and should be handled under a fume hood and by a teacher. The teacher should be notified if any spills occur. *Potassium permanganate is corrosive and can stain the skin
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solution of potassium permanganate (KMnO4). Equipment: • 4 test tubes • Test-tube rack • 4 pipettes Safety: safety glasses must be worn to prevent injury to the eyes. Ensure room is well ventilated whilst using the hydro carbons. Method: 1. Place 1 ml of sample A (cyclohexane) into a test tube containing 4 mls of the bromine water solution. Record observations of any reaction. 2. Place 1 ml of sample A (cyclohexane) into a test tube containing 4 mls of the potassium permanganate solution.
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