How is acetic acid prepared from methyl magnesium bromide ?

Explanation

Acetic Acid from Methyl Magnesium Bromide
Methyl magnesium bromide when reacts with dry ice (solid `CO_2`) in etheral solution produce salts of carboxlic acid, which on acidiffication with mineral acids give corresponding carboxylic acids.
`underset"(Methyl magnesium bromide)"(CbarH_3overset(2+)(Mg)barBr)+CO_2rarr`
`CH_3-undersetCunderset"||"O-overset-Ooverset(2+)(Mg)overset-(Br)overset"Hydrolysis"rarrunderset"(Acetic acid)"(CH_3COOH)`
(ii) Reaction of `CH_3COOH` with `NH_4OH`, followed by heating at high temperature give amides :
`CH_3*COOH+NH_4OHrarrCH_3COONH_4underset"High temp."overset(Delta)rarrunderset"(An amide, i.e. acetamide)"(CH_3CONH_2)+H_2O`