Describe the role of water in a dehydration reaction?

Answer 1

Dehydration synthesis is when two molecules are chained together and a water molecule is ejected from the coupling. A hydrolysis reaction is when a water molecule is split and the coupling between two molecules is also split.

Dehydration synthesis is the reverse reaction of hydrolysis, and vice versa.

Answer 2

Not initially, no. Water is involved in the reaction, but is only so because it is produced as a product (hence the name dehydration). When two monomers bond together, portions of the end functional groups will be clipped at the bond site and become water.

Answer 3

Water will be a product in a dehydration reaction. For example, when copper(II) sulfate hydrate is heated, the water of crystallization vaporizes, leaving behind copper(II) sulfate anhydrate. The equation is:

CuSO4.5H2O --> CuSO4 + 5H2O

Likewise, during dehydration synthesis (which is how more complex sugars are formed from simple sugars), sucrose can be formed from a glucose molecule and a fructose molecule. The equation is:

C6H12O6 (glucose) + C6H12O6 (fructose) --> C12H22O11 + H2O

Answer 4

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