Milady Esthetics State Board Practice Test

What happens to a substance when oxygen is removed from it?

1. It becomes oxidized

2. It is considered reduced

3. It remains unchanged

4. It becomes a solid

The correct answer is: It is considered reduced

When oxygen is removed from a substance, the process is referred to as reduction. Reduction is a chemical reaction that involves the gain of electrons, which corresponds with the loss of oxygen or the gain of hydrogen. In this context, when oxygen is eliminated from a substance, it alters its chemical properties and structure, leading to a reduced state. This understanding is crucial in various fields of chemistry and related disciplines, as it helps to explain how substances can transition between different states based on their electron configuration and the presence or absence of specific elements, such as oxygen. For instance, in organic chemistry, reducing agents are often substances that donate electrons and cause other substances to be reduced. This reduction can lead to the formation of different compounds or change the physical properties of the original substance. Understanding this concept is important for estheticians, especially when dealing with chemical reactions and formulation in skincare products, as these processes can significantly influence the efficacy and safety of the products used in treatments.