pure ethanoic acid is frozen to form ice like flakes. They look like glaciers, so it is called glacial acetic acid. . .
Chemical Properties (i) Reaction with metal: Ethanoic acid reacts with active metals like Na, Zn, etc., to liberate hydrogen and form their ethanoate. 2CH COOH + Zn → (CH COO) Zn + H ↑ 2CH COOH + 2Na → 2CH COONa + H ↑ (ii) Reaction with carbonates and bicarbonates: Ethanoic acid reacts with sodium carbonate and sodium bicarbonate, which are weaker bases and liberates CO , with brisk effervescence. 2CH COOH + Na CO → 2CH COONa + CO ↑ + H O CH COOH + NaHCO → CH COONa + CO ↑ + H O (iii) Reaction with base: Ethanoic acid reacts with sodium hydroxide to form sodium ethanoate and water. CH COOH + NaOH → CH COONa + H O (iv) Decarboxylation (Removal of CO ): When a sodium salt of ethanoic acid is heated with soda lime (solid mixure of parts of NaOH and part of CaO), methane gas is formed.
NaOH / CaO CH COONa CH ↑ + Na CO . . Uses of ethanoic acid Acetic acid, in lower concentration, (vinegar) is used as a food additive, a flavoring agent and a preservative. Ethanoic acid is used in the manufacture of plastic.
in making dyes, pigments and paint. in printing on fabrics. as a laboratory reagent. for coagulating rubber from latex.
in the production of pharmaceuticals. . ORGANIC COMPOUNDS IN DAILY LIFE Organic compounds are inseparable in human life. They are used by mankind or associated at all stages of life right from one's birth to death.
Various classes of organic compounds and their uses in our daily life as follows: Hydrocarbons Fuels like LPG, Petrol, Kerosene. Raw materials for various important synthetic materials. Polymeric materials like tyre, plastic containers. Alcohols As a solvent and an antiseptic agent.