carotenoid pigments by using acetone as the solvent. The chlorophyll and carotenoid pigments were extracted by using column chromography and alumina was used as the solvent. Solvents of different polarities were used‚ starting with the least polar‚ to extract the certain components from the leaves. They were then analyzed by using thin- layer chromatography. Procedure: The first part of the experiment dealt with breaking down the spinach leaves in a mortar and pestle. Acetone was added to this to help
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Jessica Robins Lab 3: Properties of Organic Compounds Introduction Distillation is a physical process used to separate chemicals from a mixture by how easy they vaporize. The temperature rises unit it reaches the temperature of the lowest boiling substance in the mixture while the other contents of the mixture remain in their original phase (until the most volatile substance has all boiled off) as it’s heated. Hot vapor results and passes into a condenser and is then converted to a liquid
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separate test tubes. Acetone was added. Using forceps‚ the strips of chromatography paper were "washed" of their pigment. Lastly the absorption spectrum‚ the absorption pattern for a particular pigment‚ was measured. Treatment: wavelengths of 400‚ 440‚ 480‚ 520‚ 560‚ 600‚ 640‚ 680‚ and 720 Control: Acetone with no pigments Replication: This investigation did not institute replication Materials: paper‚ writing utensils‚ capillary tube‚ leaf pigment extract in acetone‚ beakers‚ forceps‚ scissors
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3. Transfer the beaker from the ice bath onto the hot plate and measure the temperature of this solution to make sure it was still at or under 25 °C. 4. After letting the mixture stir for some time‚ prepare 5mL of benzaldehyde with 1.85mL of acetone into a 50mL Erlenmeyer Flask. 5. Transfer about half of the mixture into the stirring solution of NaOH‚ water and ethanol. After 2 -3 minutes‚ yellow cloudiness formed. After 10 minutes add the remainder of the solution. Allow the solution to stir
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destroyed‚ the permeability of the cell membrane is disrupted causing cellular contents to leak out. When cells are cut‚ the cell membranes are mechanically ruptured. High temperature disrupts the structure of proteins and certain chemicals such as acetone and methanol dissolve the phospholipids‚ leading to damage of the membrane and therefore leads to increased permeability. Beetroot is the material used in this experiment to demonstrate the effects of high temperature and chemicals on the permeability
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features. So‚ it can form complex ions readily. Apparatus and Materials: Measuring cylinder‚ suction filter‚ measuring cylinder‚ beaker‚ conical flask‚ petri dish‚ glass rod‚ copper(II)nitrate‚ water‚ ammonia‚ acetyl acetone Procedure: 1. 6g of Copper(II) nitrate (Cu
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polystyrene dissolves in the acetone‚ the air in the foam is released‚ causing it to look like you’re dissolving this massive quantity of material into a small volume of liquid. You can see a less-dramatic version of the same effect by dissolving other polystyrene items in acetone. Common polystyrene products include disposable razors‚ plastic yogurt containers‚ plastic mailers and cd jewel cases. The plastic dissolves in just about any organic solvent‚ not just acetone. Acetone is found in some nail polish
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Kinetics of an SN1 reaction: the effect of solvent on rate Object The purpose of this experiment is to determine the rate of hydrolysis in acetone/water (50/50 v/v and 60/40 v/v). Background and Theory An SN1 reaction of tert-butyl chloride takes place in two steps. First‚ the Alkyl Halide will leave the molecule. In this step the bond is breaking‚ which takes a longer amount of time‚ so it will determine the rate of the reaction. As a result‚ it forms a tertiary carbocation‚ since this
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Investigatory project Cassava starch as an effective component for Ideal Biodegradable Plastic Members: Wesley Ong Kyle Cheng Georwin Ng Charles Ngan Raphael Chan Table of contents I. Introduction II. Review of related literature III. Methodology Introduction A. Background of the study The cassava root is long and tapered‚ with a firm‚ homogeneous flesh encased in a detachable rind‚ about 1mm thick‚ rough and brown on
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afterwards. In Chromic Acid Test which was a test for oxidizable compounds or any compounds that possess reducing property would yield to a blue green solution if it reacted positively. This was seen in all the sample used in this test except for acetone. Whereas Dinitrophenylhydrazone (2‚4-DNP) Test was preformed to test for aldehydes and ketones which would result to a yellow orange precipitate if it was positively reacted. All the compounds subjected to this test namely
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