A hydrolysis reaction results in which two of the following?
Water is split apart.
Two molecules are split apart.
Water is formed.
Two molecules are combined.
The Correct Answer and Explanation is:
Correct Answers:
- ✅ Water is split apart.
- ✅ Two molecules are split apart.
Explanation:
A hydrolysis reaction is a type of chemical reaction that involves the breaking down of a larger molecule into smaller subunits using water. The term “hydrolysis” is derived from the Greek words “hydro” (water) and “lysis” (to loosen or break apart), meaning the reaction uses water to break bonds.
1. Water is split apart
In a hydrolysis reaction, a water molecule is broken down into a hydrogen ion (H⁺) and a hydroxide ion (OH⁻). These ions are then used to help break a bond in another molecule. For instance, in the hydrolysis of a disaccharide (like sucrose), the bond between the two sugar units is broken, and a hydrogen atom attaches to one sugar, while a hydroxyl group attaches to the other.
For example: Sucrose+H2O→Glucose+Fructose\text{Sucrose} + H₂O → \text{Glucose} + \text{Fructose}
In this process, water is split and incorporated into the products.
2. Two molecules are split apart
Hydrolysis reactions split one molecule into two. For example, during digestion, proteins are broken down into amino acids, fats into glycerol and fatty acids, and carbohydrates into simple sugars. This is done through hydrolysis. The covalent bond holding the subunits together is cleaved, and water is required for this separation.
Why the other options are incorrect:
- ❌ Water is formed: This happens in a condensation or dehydration synthesis reaction, which is the opposite of hydrolysis. In such reactions, two molecules are joined, and water is released.
- ❌ Two molecules are combined: This also describes a condensation reaction, not hydrolysis.
In summary, hydrolysis requires water to break a molecule into smaller units, playing a vital role in digestion and many biochemical processes.