General‚ Organic‚ and Biological Chemistry Copyright © 2010 Pearson Education‚ Inc. 1 Collection Terms A collection term states a specific number of items. 1 dozen donuts = 12 donuts 1 ream of paper = 500 sheets 1 case = 24 cans General‚ Organic‚ and Biological Chemistry 2 A Mole of Atoms A mole is a collection that contains the same number of particles as there are carbon atoms in 12.0 g of carbon 12C 6.02 x 1023 atoms of an element (Avogadro’s number) 1 mole of Element 1 mole of
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Combustion of Acetylene (ethyne) Rx: Back Why I don’t do acetlyene explosions in our lab.... Combustion of alkanes A quick review.... • Combustion reactions of alkanes consist only of C and H (hydrocarbon) • require O2(g) as a reactant • produce CO2(g) and H2O(g) and a large amount of energy!! Oxygen can be the limiting reagent which can lead to Incomplete combustion. For complete combustion of a hydrocarbon‚ oxygen must be in excess. If there isn’t sufficient oxygen‚ incomplete combustion occurs
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Making Connections: Chemistry Assignment By. Sujay Sukumar 5. a) When analyzing the graph‚ a relationship between the hydrocarbon chain of the alkane and its corresponding boiling point can certainly be noticed. There is a increasing correlation which can be explained using the theory that as each hydrocarbon chain gets bigger‚ there are more atoms and thus more electrons which contributes to higher dispersion forces and therefore a higher boiling point which is clearly seen through the graph.
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Chemistry Book Notes: Chapter 21: Buffers and the Titration of Acids and Bases 21-1 Henderson-Hasselbalch Equation THE HH EQUATION OFTEN CAN BE USED TO CALCULATE THE pH OF A BUFFER SOLUTION -buffer >a solution containing both a weak acid and its conjugate base can resist a change in pH by neutralizing either an added acid or an added base. Ex. acetic acid-acetate soln (acid with conj. Base) > Kc for a buffer reaction can = 1/Ka or 1/Kb if you add an acid or base because
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Why is organic chemistry important? Organic compounds are used for many different things. Daily life in today’s world would be very hard to live in without organic compounds; in fact life would not be possible without organic compounds. For example‚ most of your body is made up of organic compounds. The food you eat is made up of organic compounds. Even the flavourings and colourings on processed food are organic. The clothes you wear are‚ yes you guessed it‚ organic as well. What’s more is that
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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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How It Is Synthesized Methamphetamine was first synthesized from ephedrine in Japan in 1893 by chemist Nagai Nagayoshi. In 1919‚ crystallized methamphetamine was synthesized by Akira Ogata via reduction of ephedrine using red phosphorus and iodine. Synthesis is relatively simple‚ but entails risk with flammable and corrosive chemicals‚ particularly the solvents used in extraction and purification; therefore‚ illicit production is often discovered by fires and explosions caused by the improper
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Esterification Lab Introduction Esterification is an important part of organic chemistry that has many practical applications. Esterification can be used to make polymers. In most cases‚ esters are used for scents – they often smell fruity and sweet. In general‚ an esterification reaction results from a condensation reaction between a carboxylic acid and an alcohol. The carboxylic acid group loses an OH group‚ and the alcohol loses and H. For instance‚ the reaction between methanoic acid and methanol
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Organic Chemistry II Laboratory (ABCT357/ABCT3757) Lab Manual 2014-2015 Lee Hang Wai‚ Alston (alston.lee@polyu.edu.hk) Dr. Lee Cheng Hao‚ Samuel (chenghao.lee@polyu.edu.hk) Organic Chemistry II Laboratory (ABCT357‚ ABCT3757) (Group one) Contact: Alston Lee (alston.lee@polyu.edu.hk) Tuesday 8:30-11:30 ‚ Laboratory: Y1315 Lab supporting staffs: YK Au / Kan Chan/Arnold Demonstrators: Dr. Samuel Lee‚ Alston Lee‚ Fu Wai Chung‚ Guo Shuai‚ Yuen On Ying‚ Sep 16 Tue Acetylation of α-D-glucopyranose (Expt
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BOILING POINT G1 Decreases going down. Because metal bonds get weaker. Less energy is required this metallic bonding. BOILING POINT G 17‚18 Increases. Because the atomic size incrases. The molecules are attracted by intermolecular forces. Going down the group‚ the intermolecular forces increases. More energy is needed to overcome these stronger forces. DENSITY Because mass increases faster than volume. REACTIVITY OF GROUP 1 The number of occupied shells increases. The atomic size increases
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