Question

ethyl amine soluble in water were as aniline not. why?

Answer 1

Ethylamine when added to water forms intermolecular H−bonds with water. And therefore it is soluble in water. But aniline does not form H−bond with water to a very large extent due to the presence of a large hydrophobic −C6H5 group. Hence, aniline is insoluble in water.

Answer 2

Answer:

✔Lower aliphatic amines are soluble in water because they can form hydrogen bonds with water molecules.

✔Lower aliphatic amines are soluble in water because they can form hydrogen bonds with water molecules.✔Solubility decreases with increase in molar mass of amines due to increase in size of the hydrophobic alkyl part. Therefore, higher amines are insoluble in water.

✔Lower aliphatic amines are soluble in water because they can form hydrogen bonds with water molecules.✔Solubility decreases with increase in molar mass of amines due to increase in size of the hydrophobic alkyl part. Therefore, higher amines are insoluble in water.✔The higher amines are more soluble in less polar solvents such as ethers, alcohols and benzene.

✔Lower aliphatic amines are soluble in water because they can form hydrogen bonds with water molecules.✔Solubility decreases with increase in molar mass of amines due to increase in size of the hydrophobic alkyl part. Therefore, higher amines are insoluble in water.✔The higher amines are more soluble in less polar solvents such as ethers, alcohols and benzene.✔Aromatic amines are insoluble in water but soluble in ether, alcohol and benzene.

✔Ethylamine is soluble in water due to formation of H-bonding with water, but due to bulky phenyl group aniline does not form H-bond and thus is insoluble in water.