Question

What purpose is served by the loss of an -H and -OH end from two molecules as they join together during dehydration synthesis

Answer 1

Answer:

To create positive and negative ends to attract and hence combine with each other.

Explanation:

Two molecules combine usually by some sort of attraction between them.

When one molecule loses OH- ion,  it becomes positively charges while the other molecule loses H+ ion and becomes negatively charged.

Now two molecules , one electro positive and other electro negative attracts each other and combine by forming hydrogen bonds.

Like wise the H+ and OH- released, also combines to form water.

Answer 2

The loss of the hydrogen on one molecule produces a negative charge, which is attracted to the positive charge formed by the loss of the hydroxy group from the other molecule.