Kristine Department of Psychology College of Science University of Santo Tomas España Manila 1015 Abstract A hydrocarbon is strictly composed of carbon and hydrogen atoms only. Five hydrocarbons were used namely hexane‚ cyclohexene‚ toluene‚ naphthalene (in hexane)‚ and the unknown (which will be known through parallel chemical tests). Three tests‚ nitration test‚ bromine test and basic oxidation test were conducted to fully differentiate each type of hydrocarbon from one another. Nitration
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against head lice from the hexane extract of Annona squamosa L seed. Chromatographic and spectroscopic techniques revealed that two major compounds of the hexane seed extract were oleic acid and triglyceride with one oleate ester. The yields of these compounds were 13.25% and 7.74% dry weight‚ respectively. The compounds were tested in vitro against head lice‚ comparing to the crude hexane extract of the seed. The triglyceride with one oleate ester and the crude hexane extract diluted with coconut
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collected by suction filtration. The product was then recrystallized in the presence of 95% ethanol producing long red needles. 0.536g‚ 2.07mmol‚ 158-160°C (160°C lit3)‚ 54.6% recovery. Thin layer chromatography was performed in three different eluents‚ hexane‚ toluene‚ and acetone. The chromatography compared aniline‚ 2‚ 4-dinitrobromobenzene‚ and a sample from the mixture of the two reactants when the reaction first began to take place. Another thin layer chromatography used a product sample an hour after
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Chromatography Lab by wyk.wong » Fri Jul 11‚ 2014 10:25 am Results and Calculations Rf values Rf=(Distance moved by the spot (cm))/(Distance moved by the solvent front (cm)) Toluene: Rf=2 cm/3.8 cm=0.53 (Fluorenone) Rf=1.1 cm/3.8 cm=0.29 (Fluorene) Hexane: Rf=1.8 cm/2.2 cm=0.82 (Fluorene) Rf=0 cm/2.2 cm=0 (Fluorene Table 1: Experimental IR peaks compared to literature IR peaks for fluorenone Functional group Experimental peak (cm-1) Literature peak (cm-1) C-H 3010.5 3013 C=O 1715.2
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alkanes. ......................................................................................................................... [1] (c) Isomerisation of hexane‚ C6H14‚ produces a mixture of structural isomers‚ three of which are shown in the boxes below. (i) Draw‚ using skeletal formulae‚ two other structural isomers of hexane. [2] (ii) Name isomer B. .................................................................................... [1] (iii) Isomers A‚ B and C have different boiling
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Title : Properties of hydrocarbon Objective : 1) To study the properties of hydrocarbons. 2) To determine the unknown samples. Results : Part A : Combustion Compounds Observations Hexane There was orange flame and burned mildly during the burning process. No soots and smoke were produced. C6H14 + 19/2 O2 6CO2 + 7H2O Cyclohexene Orange flame burned vigorously. A small amount of black soot and smoke were produced during the burning process.
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Benzophenone’s nonpolar nature makes it insoluble with water (which is polar)‚ soluble with methanol (which is of intermediate polarity) and soluble with hexane (which is nonpolar). This is because generally‚ like dissolves like -- nonpolar will dissolve nonpolar but not polar‚ and vice versa. But note that this is an imperfect science -- you would expect hexane to dissolve faster and more completely than methanol (because of the differing polarities)‚ but the opposite occurred. This may be because of benzophenone’s
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Title of Experiment Extraction of Spinach Date that the Experiment was Performed This experiment was performed on Wednesday‚ September 17th‚ 2014 at 2:45 pm in the St Ignatius Science Center Laboratory 323. Partners Names Taylor Jackson and Matt D’Angelo. Taylor‚ Matt‚ and I shared the same data. Purpose/Goals/Objectives The purpose of this experiment was for each student to use column chromatography to separate plant pigments from spinach leaves. Some goals and objectives were to
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according to Table 2 was recorded at 70° C. The final sample temperature for the fractional distillation was 79° C. One microliter of sample was injected into the gas chromatograph. “Typical response factors for the possible components are as follows: hexane (1.50)‚ cyclohexane (1.80)‚ heptane (1.63)‚ toluene (1.41)‚ ethyl benzene (1.00).” DISCUSSION Table 1 Simple Distillation Boiling Points | 1st Drop | 67° C | .5 mL | 69° C | 1.0 mL | 71° C | 3.5 mL | 80.5° C | Table 2 Fractional
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through industrial discharges and also limit the amount present in drinking water. The partition – gravimetric method involves extraction of dissolved or emulsified oiland grease from water by using an extracting solvent. The common solvents used aren-hexane‚ methyl-tert-butyl ether (MTBE)‚ and trichlorotrifluoroethane. Any filterable solvent-soluble substances (e.g.‚ elemental sulfur‚ complex aromatic compounds‚ hydrocarbon derivatives of chlorine‚ sulfur‚ and nitrogen‚ and certain organic dyes) that
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