indicator. This turns from purple to colourless while unsaturation is still present. The procedure is the same as for bromine water‚ but portions of the potassium permanganate are added with swirling until the mixture fails to produce a colourless solution. The mixture requires more and more swirling as the amount of potassium permanganate increases. Warming fats in the Volasil using a beaker of hot water helps the fat dissolve and also speeds up the reaction. This experiment should be done
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16 OBJECTIVE The objective of this experiment is to distinguish the difference between various types of hydrocarbons by performing simple tests and reactions involving hydrocarbons. EQUIPMENT AND CHEMICALS Pentene Toluene Heptane Potassium permanganate (1% KMnO4) Aluminum chloride (anhydrous AlCl3) Chloroform (CHCl3) Ligroin Br2 in CCl4 (5%) Stopper pH paper Small test tubes and rack Graduated cylinder (10 ml) Evaporating dish DISCUSSION Organic chemistry is the study of
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double bond in the products. Addition of bromine to the fractional distillate caused the bromine to discolor. The addition of bromine to 2-methyl-cyclohexanol remains brown because there is an absence of double bound (saturation). Addition of potassium permanganate caused the solution to turn slightly brown but appeared immiscible as result of the unsaturation product. When analyzing the IR results confirmed the presence of an alcohol group with a distinctive wide peak at 3400 cm-1. The presences of
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Task 3: The chemical tests used in order to carry out and collect these results are useful for the simple identification of colourless organic liquids and ones that are often found at the scenes of crime. The first test carried out was the Lucas test which was used to identify a variety of alcohols following the contribution of a given solution‚ from carrying this out I could then identify that primary and secondary alcohols were present with one tertiary alcohol also being present however despite
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which is red in acids and yellow in alkali solutions. Not every titration requires an indicator. In some cases‚ either the reactants or the products are strongly colored and can serve as the "indicator". For example‚ a redox titration using potassium permanganate (pink/purple) as the titrant does not require an indicator. When the titrant is reduced‚ it turns colorless. After the equivalence
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of Experimentation: 10/12/10; 10/19/10 Title: Studying the Rate of Reaction of Potassium Permanganate and Oxalic Acid Abstract: The purpose of this experiment was to determine the reaction order and write a rate equation with respect to changes in permanganate ion and oxalic acid concentrations and to examine the effect temperature has on the rate of the reaction 1. In part one‚ the reactants potassium permanganate (KMnO4) and oxalic acid (H2C2O4)‚ three determinations were performed‚ each with
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Section A (Answer ALL questions in this Section.) 1. Rubidium (Rb) and potassium belong to the same group in the Periodic Table. The relative atomic mass of rubidium is larger than that of potassium. (a) Explain whether rubidium is more reactive than potassium. (b) Write a chemical equation for the reaction between rubidium and water. (State symbols should be given.) (c) Suggest how rubidium can be stored safely in the laboratory. (d) Suggest ONE safety precaution for handling
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cotton balls b. Substances - hydrochloric acid (HCl) - ammonium hydroxide (NH4OH) B. Testing the Hypothesis Concerning the Rate of Diffusion a. Apparatus - petri dish of agar-water gel with three wells b. Substances - potassium permanganate (KMnO4) - potassium dichromate (K2CR2O7) - methylene blue III. Procedure: A. Formulation of Hypothesis 1. Fasten the glass tube to a ring stand. 2. Simultaneously moisten two cotton balls with hydrochloric acid and ammonium hydroxide
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Diffusion: Temperature’s Effect on Diffusion: We added potassium to a two tubes with different temperatures: Temperature Result Room Temperature Slow change in Color Boiled water Fast change in Color Conclusion : The increase in temperature assists in increasing the speed of diffusion. Diffusion of Glucose and Starch: A. Color Change: State/Results In the Tube In the Beaker Color Glucose Color Glucose Initial State (Before placing tube into graduated cylinder) Transparent Yes
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AP BIOLOGY CELL UNIT ACTIVITY #5 NAME_____________________ DATE___________HOUR_____ CELL TRANSPORT MEMBRANE PROPERTIES PASSIVE TRANSPORT CHARACTERISTICS: DIFFUSION: Cell Unit Activity #5 page 1 OSMOSIS : ISOTONIC ANIMAL CELLS Cell Unit Activity #5 page 2 HYPOTONIC HYPERTONIC PLANT CELLS OSMOREGULATION – ADAPTATIONS Paramecium Fresh Water Bony Fish FACILITATED D IFFUSION: Cell Unit Activity #5 page 3 Marine Bony Fish ACTIVE TRANSPORT CHARACTERISTICS:
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