frequently released. The 2 liquids separated into clear layers and the lower layer (dichloromethane layer) was tapped into an Erlenmeyer flask. The aqueous layer was placed into a 400 ml beaker. The dichloromethane was placed back in the separatory funnel. 3. The dichloromethane was extracted with 2 more fresh portions of sodium bicarbonate solution. The bicarbonate solutions are combined in the beaker. 4. The dichloromethane was dried with about 10g of anhydrous sodium sulphate for 10 minutes after which
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ACYL COMPOUNDS: SOAPS AND DETERGENTS Experiment # 8 I. Objectives To observe the general properties of carboxylic acids. To compare the acidity of carboxylic acids and phenols. To verify experimentally the interconversion among acyl compounds. To become familiar with the physical and chemical properties of fats and oils and to understand the chemical basis of these properties. To learn how to prepare soap. To compare the properties of soap and synthetic detergents. II. Data and
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Compounding in English and Vietnamese: A Contrastive Analysis Nguyen Ngoc Thao HCMC University of Education Introduction According to Wikipedia‚ a compound is a lexeme (less precisely‚ a word) that consists of more than one stem. Compounding is the word formation that creates compound lexemes (the other word-formation process being derivation). It refers to the faculty and device of language to form new words by combining or putting together old words. In other words
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Assignments in Science Class X (Term II) 4 Carbon and its Compounds IMPORTANT NOTES 9. Unsaturated organic compounds : Organic compounds in which a double or a triple bond exists between two carbon atoms in a carbon chain‚ are called unsaturated organic compounds. 10. Hydrocarbons : Organic compounds which contain only carbon and hydrogen atoms are called hydrocarbons. 11. Straight chain hydrocarbons : Hydrocarbons‚ in which all the carbon atoms are linked to one another in a straight chain
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Properties of life‚ Basic Chemical Terminology‚ Molecules and Compound of a cell Properties of life: All living things are made of cells and keep certain characteristics in common. All living things are divided into several characteristics: order‚ reproduction‚ growth and development‚ energy processing‚ respond to the environment‚ regulation and evolution. Cells are either made of prokaryotic or eukaryotic. Prokaryotic is simple‚ small and lacking membrane-enclosed membrane. Eukaryotic
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Carbon and Its Compounds Carbon: Introduction Atomic Number: 6 Electronic Configuration: 2‚ 4. Valence electrons: 4 Property: Non-metal Abundance:- Carbon is the 4th most abundant substance in universe and 15th most abundant substance in the earth’s crust. Compounds having carbon atoms among the components are known as carbon compounds. Previously‚ carbon compounds could only be obtained from a living source; hence they are also known as organic compounds. Bonding In Carbon:- The Covalent
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1. An organic compound X with a molecular formula C2H6O undergoes oxidation with in presence of alkaline KMnO4 to form a compound Y. X on heating in presence of Conc. H2SO4 at 443K gives Z. Which on reaction with H2Oin presence of H2SO4 gives back `X` `Z` reacts with Br2 (aq) and decolorizes it. Identify X‚ Y‚ & Z and write the reactions involved. 2. An organic compound ‘A’ is widely used as a preservative in pickles and has a molecular formula C2H2O2. This compound reacts with ethanol to
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IONIC COMPOUNDS In chemistry‚ an ionic compound is a chemical compound in which ions are held together in a lattice structure by ionic bonds. Usually‚ the positively charged portion consists of metal cations and the negatively charged portion is an anion or polyatomic ion. Ions in ionic compounds are held together by the electrostatic forcesbetween oppositely charged bodies. Ionic compounds have high melting and boiling points‚ and they are hard and very brittle. Ions can be single atoms‚ as the sodium and chlorine in
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of 1-Phenyl-3-phenylaminopyrrolidine-2‚5-dione An Organic Laboratory Experiment on the Michael Addition Ram N. Ram1 and Kiran Varsha Indian Institute of Technology‚ Delhl Hauz Khas‚ New Delhl-110016‚ India The Michael Addition is one of the important synthetic methods for the preparation of 1‚3- and 1‚5-difunctionalized compounds ( I ) . Virtually all undergraduate organic chemistry textbooks use a consideration of the Michael addition‚ hut few suitable laboratory experiments have been puhlished
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Carbon and Its Compounds Carbon: Introduction Atomic Number: 6 Electronic Configuration: 2‚ 4 Valence electrons: 4 Property: Non-metal Abundance: Carbon is the 4th most abundant substance in universe and 15th most abundant substance in the earth’s crust. Compounds having carbon atoms among the components are known as carbon compounds. Previously‚ carbon compounds could only be obtained from a living source; hence they are also known as organic compounds. Bonding In Carbon: The Covalent Bond
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