copper, used as a catalyst at K, it is dehydrogenated to acetaldehyde. CH CH OH CH CHO + H Ethanol Acetadehyde Cu 573K (vi) Combustion: Ethanol is highly inflammable liquid. It burns with oxygen to form carbon dioxide and water. C H OH + 3O 2CO + 3H O Ethanol Carbon dioxide .
. Uses of ethanol Ethanol is used in med ical wipes, as an antiseptic. as an anti-freeze in automobile radiators. for effectively killing micro organisms like bacteria, fungi, etc., by including it in many hand sanitizers.
K Cr O / H + Carbon and its Compounds as an antiseptic to sterilize wounds in hospitals. as a solvent for drugs, oils, fats, perfumes, dyes, etc. in the preparation of methylated spirit (mixture of % of ethanol and % of methanol) rectified spirit (mixture of . % of ethanol and .
% of water), power alcohol (mixture of petrol and ethanol) and denatured spirit (ethanol mixed with pyridine). to enhance the flavour of food extracts, for example vanilla extract; a common food flavour, which is made by processing vanilla beans in a solution of ethanol and water. . ETHANOIC ACID (CH COOH) Ethanoic acid or acetic acid is one of the most important members of the carboxylic acid family.
Its molecular formula is C H O . Its structural formula is H — C — C — OH H H — — — — O . . Manufacture of ethanoic acid Ethanoic acid is prepared in large scale, by the oxidation of ethanol in the presence of alkaline potassium permanganate or acidified potassium dichromate.
KMnO / OH - CH CH OH CH COOH + H O Ethanol [O] Ethanoic acid . . Physical Properties (i) Ethanoic acid is a colourless liquid having an unpleasant odour. (ii) It is sour in taste.
(iii) It is miscible with water in all proportions. (iv) Its boiling point is higher than the corresponding alcohols, aldehydes and ketones. (v) On cooling,