Sources, properties and uses detergents and soaps Structure, their mode and action. Fats and oils belong to a general group of compounds known as lipids. SOURCES Fats are solids that usually come from animals e.g. Tallow (mutton fat). Oils are liquids that come from plants e.g. vegetable oil, coconut oil etc. Both fat and oil […]
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ALKANOATES General molecular formula, nomenclature, preparation, properties and uses. SOURCES The alkanoic acid or carboxylic acids are also called fatty acids because some of them are found in natural fats and oils. They contain the functional group called carboxy group. NOMENCLATURE The IUPAC name of each homologue is obtained by changing the “-e”
SOURCES OF ALKANOLS – From destructive distillation wood. – From starchy food and sugar General molecular formular Alkanol is a homologous series with general molecular formular of Cn H2n+1OH or ROH. Or (CnH2n+2O). Nomenclature The names of alkanols are obtained by substituting “e” in alkanes with “Ol” in alkanol e.g. methanol (CH3OH), ethanol
Benzene: Benzene is a typical aromatic compound with molecular formula of C6H6. It has the structure of: Preparation From coal tar: The destructive distillation of coal produced coal tar which contain benzene From petreoleum; The dehydrogenated of alkane using valladim (v) oxide (v2O5) as catalyst at 500oC and 20 atmos give benzene C6H14 V2O2C6H6 +
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Alkynes are the homologous series of unsaturated hydrocarbon with a general molecular formua CnH2n-2. Alkynes show a high degree of unsaturation than alkenes, hence,t hey are chemically more reactive than the corresponding alkenes or alkanes. Examples are : H H – C = C – H HC – C = C- H [ Ethyne.
UNSATURATED HYDROCARBONS These are hydrocarbons in which carbon atoms join with each other by multiple bonds. The multiple bond can be double bonds e.g Alkene or triple bonds e.g Alkyne. Ethene2 .Ethyne H – C = C – H H – C = C – H H H. Alkenes e.gEthene Nomenclature The process of naming
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THE HALOGENS – GROUP 7 The halogens are all in group 7 on the right of the periodic table. This group consists of elements like Fluorine (F), Chlorine (Cl), Bromine (Br), Iodine (I), Astatine (At). The Halogens are typical non-metals and form the 7th Group in the Periodic Table ‘Halogens’ means ‘salt formers’ and the
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