Write short note on :
(i) Catenation (ii) Glacial acetic acid (iii) Saponification
Write short note on :
(i) Catenation (ii) Glacial acetic acid (iii) Saponification
(i) Catenation- Carbon has the unique ability to form bonds with other atoms of carbon, giving rise to large molecules. This property is called catenation. These compounds may have long chains of carbon, branched chains of carbon or even carbon atoms arranged in rings. In addition, carbon atoms may be linked by single, double or triple bonds. No other element exhibits the property of catenation to the extent seen in carbon compounds. The carbon-carbon bond is very strong and hence stable. This gives us a large number of compounds with many carbon atoms linked to each other.
(ii) Glacial acetic acid- 5-8% solution of acetic acid/ethanoic acid in water is called vinegar and is used widely as a preservative in pickles. The melting point of pure ethanoic acid is 290 K and hence it often freezes during winter in cold climates. This gave rise to its name glacial acetic acid.
(iii) Saponification- Esters react in the presence of an acid or a base to give back the alcohol and carboxylic acid. This reaction is known as saponification because it is used in the preparation of soap.
CH3COOC2H5 + NaOH → CH3COONa + C2H5OH
(i) Catenation- Carbon has the unique ability to form bonds with other atoms of carbon, giving rise to large molecules. This property is called catenation. These compounds may have long chains of carbon, branched chains of carbon or even carbon atoms arranged in rings. In addition, carbon atoms may be linked by single, double or triple bonds. No other element exhibits the property of catenation to the extent seen in carbon compounds. The carbon-carbon bond is very strong and hence stable. This gives us a large number of compounds with many carbon atoms linked to each other.
(ii) Glacial acetic acid- 5-8% solution of acetic acid/ethanoic acid in water is called vinegar and is used widely as a preservative in pickles. The melting point of pure ethanoic acid is 290 K and hence it often freezes during winter in cold climates. This gave rise to its name glacial acetic acid.
(iii) Saponification- Esters react in the presence of an acid or a base to give back the alcohol and carboxylic acid. This reaction is known as saponification because it is used in the preparation of soap.
CH3COOC2H5 + NaOH → CH3COONa + C2H5OH
