Analysis of Alcohols‚ Aldehydes and Ketones Karl Wayne Mancao‚ Raphaell Mordeno‚ Andres Pastrana III*‚ and Shannen Peñaverde Department of Biology‚ University of Santo Tomas‚ Manila‚ Philippines Abstract The proponents have done several tests for identifying alcohols‚ aldehydes and ketones. These tests are Dichromate test‚ Tollens test‚ Lucas test‚ DNPH test and Iodoform test. Three samples got positive result in dichromate test and one in Tollens test. Lucas test got one sample that has
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CHEM 2123 and 2125 – Organic Chemistry Lab I and II GUIDELINES FOR WRITING LAB REPORTS INTRODUCTION Writing reports in organic chemistry lab may differ from the way it’s done in general chemistry. One goal of this course is to introduce you to the record keeping methods used in research labs. Such methods are designed to organize experimental data in a format similar to that required for publication in major scientific journals. Here are some important considerations that apply in research settings
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be a very brief statement such as: To determine the effect of pH on the food preservative Sodium Benzoate. Theory (2 points) In this section you should briefly summarize what the textbook says in regards to the history and uses of the chemicals that are being utilized in the experiment. Nothing elaborate – just the basic idea behind the reaction. Reaction (3 points) Reaction: sodium benzoate + hydrochloric acid ( benzoic acid + sodium chloride Amounts: 2.00 g
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most abundant of the pigments are chlorophyll A and chlorophyll B‚ the only Name of Class fast alkanes alkenes ethers halogenated hydrocarbons aromatic hydrocarbons increasing polarity aldehydes and ketones esters alcohols amines slow carboxylic acids General Formula difference between the two is that on ring 3 chlorophyll a has a RH R2C CR2 methyl group where chlorophyll b R2O RX CH3 has an aldehyde functional ‚ etc group. None of these main pigments absorb green RCH O and R2C
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Contents PART XV ANALYTICAL CHEMISTRY Chapter 63 Detecting the presence of chemical species Action of heating solid sample strongly 1 Chapter 64 Separation and purification methods Centrifugation Sublimation Partition equilibrium of a solute between two immiscible solvents Two-dimensional thin-layer chromatography 2 2 3 6 Chapter 65 Quantitative methods of analysis Detection of end point in acid-alkali titration 8 Chapter 66 Instrumental analytical methods More
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(giving CO2 and H2O) | Al2 O3 and vaporisation of alkane at 500°C; Cracking of Alkanes | Al2 O3 is used as a catalyst. Heat provides energy for breakage of C-C bonds. | UV light; Initiation step of FRS of alkanes by halogens * Not required for electrophilic addition reaction btw Halogens and alkenes | Br-Br 2Br Provides the energy for homolytic fission of Br-Br bond. Visible and infra-red radiations are unable to break covalent bonds while UV light can‚ because one quantum of UV light has sufficient
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their possible result. Analyze and state the observation based on the result of experiment. Methodology Materials and Apparatus The chemicals used in the experiment are as follows: benzoic acid‚ sugar‚ denatured alcohol‚ chloroform‚ acetanilide‚ copper sulfate‚ activated charcoal‚ distilled water‚ acetone‚ toluene‚ glutamic acid and glycine. The apparatus used include funnel‚ Erlenmeyer flask‚ separatory funnel‚ beakers‚ evaporating dish‚ water bath‚ graduated cylinder‚ stirring rod‚ watch
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Sulphonation – The Process Most electrophilic substitution reactions are irreversible but sulfonation is an exception. Treatment of benzene with "oleum" (a solution of SO3 in concentrated sulfuric acid) will give the sulfonic acid‚ the electrophilic species being sulfur trioxide which is Lewis acidic. Fig – 1 Sulphonation : Benzene equation The sulfonic acid can be converted back by treatment with hot aqueous acid. The reason for this reversibility is the fact that the Wheland intermediate is overall
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P‚ Sriram D. Betulinic acid and its derivatives: a review on their biological properties. Curr Med Chem‚ 2005: 12(6): 657-666. 22. Garcia CC‚ Talarico L‚ Almeida N‚ Colombres S‚ Duschatzky C‚ Damonte EB. Virucidal activity of essential oils from aromatic plants of San Luis‚ Argentina. Phytother Res‚ 2003: 17: 1073-1075. 71 Pharmacologyonline 3: 64-72 (2006) Newsletter Chattopadhyay 23. Sakurai N‚ Wu JH‚ Sashida Y. et al. Anti-AIDS agents. Part 57: Actein‚ an antiHIV principle from the rhizome of
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- I Page No. www.kalvisolai.com 5 Mark Compulsory Problems with Solution 16. Hydroxy Derivatives 8 Q. No. 70 A Hydroxy derivatives problems are classified into aliphatic group and aromatic group. The aliphatic problem part is further classified to 1°‚ 2° and 3° alcohols‚ glycol and glycerol. The aromatic problem part is subdivided into phenol and benzyl alcohol. There is no need of writing equation for hints (e.g. undergoes iodoform test). Equations to be written
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