Group 5 Experiment No. 5 Classifications of Alcohols: Lucas Test Q1. REACTION OF PRIMARY‚ SECONDARY AND TERTIARY ALCOHOLS WITH LUCAS REAGENT ALCOHOL IMMEDITE REACTION WITH LUCAS’ REAGENT OBSERVATIONS AFTER 5 MINUTES AT 27 °C TO 28 °C n-butyl alcohol No reaction occurred Secondary butyl alcohol cloudy Tertiary butyl alcohol Cloudy appears Q2. REACTION OF SECONDARY AND TERTIARY ALCOHOLS WITH CONCENTRATED HYDROCHLORIC ACID ALCOHOL OBSERVATIONS Secondary butyl alcohol
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as primary (1°)‚ secondary (2°)‚ or tertiary (3°) alcohols depending on whether the -OH group is attached to a carbon with 1‚ 2 or 3 other carbon atoms attached to it. These different alcohols react differently with Lucas reagent and with Bordwell-Wellman reagent; hence these reagents can be used for identifying the class of alcohol. The relative acidity of phenols can be used to characterize this class of alcohols relative to the alkyl alcohols. This property will be exploited in the identification
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The test tubes remained standing for 5 min‚ with occasional shaking. After allowing adequate time for the reactions to occur‚ the test tubes were observed to determine if there was any colour change. Results Table 1: Reactions of Alcohols with Lucas Reagent and KMnO4 Oxidizing Agent 1-butanol (Primary Alcohol) 2-butanol (Secondary Alcohol) 2-methyl-2-propanol (Tertiary
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3/5/2011 EXPERIMENT EXPERIMENT 8 OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS 8 Objectives to differentiate various types of oxygen-bearing organic compounds to device a scheme to distinguish each functional group Analysis of Oxygen-bearing Organic Compounds alanx3@yahoo.com OBJECTIVES CONCEPTS REAGENTS PROCEDURE RESULTS DISCUSSION IR ANALYSIS to characterize an unknown sample through parallel chemical tests ARMSALCEDO ARMSALCEDO alanx3@yahoo
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| | H R R Primary Alcohol(1 ̊) Secondary Alcohol(2 ̊) Tertiary Alcohol(3 ̊) Lucas reagent‚ a mixture of concentrated hydrochloric acid and anhydrous zinc chloride‚ can be used to differentiate the three classes of alcohols. Tertiary alcohol turns cloudy or appears in two layers almost immediately‚ secondary alcohol reacts within 5 to
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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 a positive result‚ DNPH test got two positive results and Iodoform test also got two. All unknowns are identified from which of the samples are they. Alcohols
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compounds were given namely Methanol‚ 2-propanol‚ tert - butanol‚ formalin‚ and acetone. Different tests were done to each sample to differentiate their characteristics. These test were Dichromate test‚ Tollens Test‚ DNPH test‚ Iodoform Test‚ and Lucas Test. This was conducted to classify the samples from being a primary alcohol‚ a secondary alcohol‚ a tertiary alcohol‚ aldehyde‚ or a ketone. Introduction In analyzing the oxygen bearing organic compounds‚ there are several tests that may be performed
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namely the involvement of the solubility of alcohols in water‚ the Lucas Test‚ the Chromic Acid Test or also known as Jones Oxidation‚ the 2‚4-Dinitrophenylhydrazone (2‚4-DNP) Test‚ the Fehling’s Test‚ the Tollens’ Silver Mirror Test‚ and the Iodoform Test. The solubility of alcohols in water test showed that the sample‚ benzyl alcohol was immiscible while ethanol was the most miscible from all the other compounds used. While in Lucas Test which was used to differentiated the primary‚ secondary‚ and
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2 test tubes were compared. For aldehydes Tollen’s reagent was used‚ 1 mL was placed into both test tube along with one have 2 drops of the unknown #12 and another with 2 drops of the aldehyde. For Ketones a reagent called phenylhydrazine (C6H5NHNH2) was used‚ 1 mL of it was added to both test tubes with one test tube having 2 drops of the unknown and the other the 2 drops of ketone. For the alcohols 3 test tubes were used‚ 2 mL of Lucas reagent was added to each test tube with one having 5 drops
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Practical 2 Reaction of alkane‚ alkene & alkyne Title: Reaction of Saturated and Unsaturated Hydrocarbons Objective: To carry out chemical test to differentiate an alkane and an alkene. Apparatus: dropper‚ test tube‚ hot plate Chemical reagents: bromine‚ toluene‚ cyclohexane‚ cyclohexene‚ acidified KMnO4‚ dichloromethane Method A. Bromine test 1.6 clean and dry test tube were taken and were labelled them A until F 2.1ml of dichloromethane were placed into each test tube 3.1 ml of
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