Question

Q Physical properties, chemical properties

and uses of Ethanoic acid.



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Answer 1

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Ethanoic Acid

Physical properties :

(i) Ethanoic acid is vinegar smelling liquid. The lower carboxylic acids are liquids whereas higher ones are solids.

(ii) Ethanoic acid is sour in taste. Other lower carboxylic acids are also sour in taste.

(iii) Ethanoic acid has boiling point 391 K.

Chemical Properties :

(i) Ethanoic acid is weak acid but it turns blue litmus red.

(ii) Reaction with Metal: Ethanoic acid reacts with metals like Na, K, Zn etc. to form metal ethanoates and hydrogen gas.

(iii) Reaction with Carbonates: Ethanoic acid reacts with bicarbonates and carbonates and produces brisk effervescence due to formation of carbon dioxide.

Uses of Ethanoic acid :

(i) It is used for making vinegar

(ii) It is used as a laboratory reagent

(iii) It is used for preparation of white lead [2PbCO3.Pb(OH)2] which is used in white paints.

(iv) It is used for coagulation of rubber from latex and casein (protein) from milk

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Answer 2

Answer:

1. A physical property is any property that is measurable, whose value describes a state of a physical system.
2. A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.

Ethanoic or acetic acid is used in making dyes, pigments, and paint and coating additives. It is used in printing on fabric.