Answer to Question #249526 in Organic Chemistry for Trac

Question

B. Solubility of Amines in Water and Acid

1. Draw structural formulas of the following molecules. Include the lone pair of electrons.

a. 1-butanamine

b. N-methyl-1-butanamine

c. N,N-dimethylbutanamine

Answer 1

When the amines receive a H+ ion from the acid, they become charged and are able to form (strong) ion-dipole interactions with water molecules. Basically it becomes a salt and it dissolves just like how table salt gets dissolved in a glass of water.