Experiment 11: Synthesis of Dibenzalacetone by the Aldol condensation Introduction: The Aldol condensation reaction‚ under basic conditions‚ involves the nucleophilic addition of an enolate ion to another carbonyl group. The resulting product‚ a beta-hydroxy ketone or aldehyde‚ is called an aldol because it contains both and aldehyde group and the hydroxy group of alcohol. Condensations‚ including aldol condensation‚ combine two or more molecules‚ typically with a loss of a smaller molecule (including
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Trans-European Plastics (TEP) is one of the largest manufacturers of plastic household items in England. (Slack‚ 2010) Their factories have the ability to ship products to its customers within one week. The manufacturing operation is based on batch production‚ employing 24 large injection-moulding machines. TEP has recently been faced with declining delivery reliability and backlog. Apparently resulting from ‘split batches’ where only part of a planned production batch is produced to overcome
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What are trans fatty acids‚ and where do they come from? We’re used to hearing about saturated and unsaturated fatty acids. Saturated fatty acids - which come from animal fats (meat‚ lard‚ dairy products) as well as tropical oils such as coconut and palm oils - raise the levels of LDL cholesterol. Unsaturated fats - which come from vegetable oils - in general‚ do not increase cholesterol levels‚ and may reduce them. Because saturated fatty acids were found to be bad for you a couple decades ago
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Chapter 1 MULTIPLE CHOICE QUESTIONS Topic: Atomic Orbitals 1. A) B) C) D) E) In quantum mechanics a node (nodal surface or plane) is: a place where Ψ is negative. a place where Ψ is positive. a place where Ψ = 0. a place where Ψ2 is large. a place where Ψ2 is negative. Ans: C Topic: Atomic Orbitals‚ Molecular Orbitals 2. When the 1s orbitals of two hydrogen atoms combine to form a hydrogen molecule‚ how many molecular orbitals are formed? A) 1 B) 2 C) 3 D) 4 E) 5 Ans:
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HKCEE Chemistry 2007 Paper 1 Section A 1. A is a compound formed from oxygen and magnesium‚ while B is a compound formed from oxygen and fluorine. a) Draw the electronic diagram of A‚ showing electrons in he outermost shells only. (1) b) Draw the electronic diagram of B‚ showing electrons in the outermost shells only. (1) c) Compare the melting points of A and B. Explains your answer. Melting point of A is higher than that of B. Ions of A are linked by strong ionic bonds /
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Section instructor: Supratim Giri Email: girisupr@gmail.com Office: BMBT 416 1 CY 101: Electrochemistry 2 Submarines can propagate on the sea surface just like a ship Unless it’s a nuclear submarine; just like a ship‚ submarine’s propulsion is supplied by a diesel engine The sub intakes oxygen from air to run its diesel engine. But in order to strike an enemy ship‚ it has to take plunge in deep sea and remain submerged for a period between 24 to 48 hours! How the submarine
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CHEMISTRY 101.1 Intermediate Chemistry Laboratory I Institute of Chemistry University of the Philippines‚ Diliman I. Synthesis of Salicylic Acid Purpose: Part I of the experiment illustrates the base hydrolysis of an ester‚ methyl salicylate‚ to form salicylic acid through nucleophilic acyl substitution. Procedure: Dissolve 12 g NaOH in 70 mL water in a 150 mL round bottom flask. Add 5.0 mL methyl salicylate and reflux the reaction mixture at its boiling point for 15 minutes using a stirrer
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Baking Project There are several chemical reactions taking place in the general baking of cakes. Every ingredient has its own function and causes a different reaction Synthesis: * Egg yolks (modify molecule’s structure) helps the oil-based and water-based components of the cake mix together. When eggs are cooked‚ the protein molecules become uncurled when exposed to heat and create new molecular bonds with other nearby protein molecules. When the egg is completely cooked‚ it helps form a
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Unit 1 Key Questions Lesson 1 1. One argument against continuing research on the atom is that the cost continues to increase at an alarming rate‚ and the benefits seem to be declining. Whereas quantum chemistry experiments as early as 80 years ago were very cheap and yielded considerable practical results‚ now very few if any practical results are emerging‚ but the costs of experiments continues to increase. On the other hand
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ical Chemistry 1.which of the following pairs of compound will react? iC3H6+Br2 iiC3H6+Cl2 in sunlight iiiC3H6+H2O in the presence of sulphuric acid ivC3H6+H2O in the presence of concentrated sulphuric acid a.i b.i‚iii c.i‚ii‚iii d.all 2.liqiud y reacts with magnesium metal to produce a gas that burns with a pop sound when a flaming wooden splint is placed near it.liqiud y is most likely a compound that has the formula a.c2h5oh b.hcooh c.h3cooch3 d.c6h14 3.a compound p has the
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