Sometimes found in food packaging, you’ll find a small, white packet with “silica gel” written on it. Have you ever wondered what this silica gel is and why we find it everywhere? First, let’s get to know what silica gel is.
Silica gel is an amorphous form of silicon dioxide, which means that its atoms have an irregular framework. In the traditional frame of silicon gel, oxygen and silicon atoms are placed at a distance, which measured in the nanometer-scale, which creates pores in the structure. The second quality of silica gel is that it is an acceptable form. If these voids or pores filled with gas or vaccine, the silica gel is called silica xerogel. Silica gel is usually the component that we find in those little packets in granular form. Some of them contain some indicators which can change colour after absorbing water. For silica gel, this is one of the essential properties, and we’ll see why in the next few lines.