Welcome to our site! We wanted to share pictures and videos related to the “Spherification with Calcium Alginate” chapter and we thought that a website would have helped us. Here we describe a laboratory experiment to show students, through molecular diffusion, that gels are dispersed systems behaving at the same time as liquids and solids.
The experiment allows verifying that calcium alginates behave both as a solid and a liquid. A few drops of pH indicator are included into alginates droplets, that are then bring to a different pH value. This process can be followed by eye thanks to this color modification.