Introduction Metallic yarns or threads‚ in general‚ have been known for more than 3000 years. Gold and silver were hammered into extremely thin sheets‚ then cut into ribbons and worked into fabrics. These were the first ‘man made’ fibres‚ which came thousands of years before nylon or rayon. The Persians made fabulous carpets with gold thread and the Indians‚ ornamental sarees with it. The metal threads were twisted‚ doubled or wrapped around some other thread such as cotton. With the advancement
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detergents‚ each of them were placed into different solvents to see if they dissolved. None of the oils and fats were soluble in water (H2O)‚ sodium hydroxide (NaOH)‚ or hydrochloric acid (HCl)‚ but they were soluble in toluene and partly soluble in acetone. Testing the soaps and detergents for their solubility in water is the most important solubility test because they should form a lather that allows them to clean easily. Most of the soaps and detergents did not readily dissolve in water‚ but with
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drops 12M HCl. Precipitate Decantate Centrifuge and separate. Let stand for 1 min. Acidify with 6M HOAc and add several KNO2 crystals Acidify with 1 M HCl and add several NH4CNS crystals. Warm mixture. Add equal volume of acetone or ethanol and agitate the mixture afterwards. Formation of yellow precipitate indicates presence of Co3+. Formation of bright reddish pink precipitate means presence of Ni2+. Formation of blue colored solution shows presence of Co2+.
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12/14/13 Pre 3 Reduction of a Ketone WebAssign Pre 3 Reduction of a Ketone (Lab 3) Current Score : 60 / 60 Emmaline Smith C H 224‚ section 043‚ Fall 2013 Instructor: Aaron Francis TA Due : Wednesday‚ September 18 2013 08:10 AM EDT The due date for this assignment is past. Your work can be viewed below‚ but no changes can be made. 1. 10/10 points | Previous Answers NC SUMEOrgC hem2 3.PRE.001. What is the IUPAC name of the following compound? 5-methyl-3-heptanone 5-ethyl-3-hexanone
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11. Determine the percent pure for each component of the mixture. 12. Pour some of each fraction into three separate vials‚ label and store. 13. Disassemble and clean the fractional distilling apparatus using hexane for the joints and acetone for the glassware. III. Observations O O O O Ethyl Acetate Butyl Acetate (boiling point ~ 78◦C) (boiling point ~ 120◦C) Initial temperature of fractional distillation apparatus:
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compound. However at low temperatures benzoic acid is insoluble in water. Compounds are soluble in solvents with the same polarity‚ like dissolves like. Table 1.1 Benzoic Acid solubility Dissolve Heat Ice H2O No No No Ethanol Yes Yes Yes Hexane No No Acetone Yes Yes Toluene No Yes No The benzoic Acid was dissolved in a very small amount of hot ethanol once dissolved water was added drop wise using a disposable pipet until it got cloudy. Once it reached this point the substance was removed from the
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A vast area of the North Pacific Ocean‚ often referred to as the “Great Pacific Garbage Vortex” is an area heavily concentrated in marine debris such as plastic and various other chemicals leaching into marine ecosystems and creating detrimental environmental and health impacts. The garage patch is divided into an Eastern patch located off the coast of California and a Western patch found off the coast of Japan‚ that work collaboratively to spin the marine debris. The North Pacific Subtropical Convergence
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Asprin(Acetylsalicylic acid)- First compound used on TLC plate to compare the unknown. Salicylamide(o-hydroxybenzamide)-Second compound used on TLC plate to compare unknown. Caffine(1‚3‚7-Trimethylxanthine)-Third compound used on TLC plates to compare unknown. Acetone- Solvent A used in paper chromatography. Ethanol- Solvent B used in paper chromatography. Dithiooxazmide- Spray used to show to spots on paper chromatography Sodium Diethyldithiocarbamate- Second spray used to show spots on paper chromatography
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chromatography separation. Note: because lycopene is light-sensitive‚ prevent any unnecessary exposure to light. Procedure: Weigh roughly 1.0 g of tomato paste into a 15 mL centrifuge tube. Add 4 mL of a 50/50 (% volume) mixture of petroleum ether and acetone. Cap the centrifuge tube and shake until the solid becomes fluffy. Open the cap and crush the solid with a spatula. Close the tube and shake again. Repeat this crushing and shaking two more times. Centrifuge the tube to separate the extract and residue
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ORGANIC COMPOUNDS State what types of intermolecular forces are present in solutions formed due to intermolecular attractions between the solute and the solvent. Compound 1 Compound 2 Intermolecular Forces Class S (Water-soluble) Compounds Acetone Water Hydrogen Bonding & London Dispersion Forces Diethyl Ether Dipole – Induced Dipole & London Dispersion Forces Ethyl Alcohol (Ethanol) Water Hydrogen Bonding & London Dispersion Forces Diethyl Ether Dipole – Induced Dipole & London
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