Final answer:
Products in colloidal form include gelatin, glue, starch, dehydrated milk powder, and aerosol sprays. These products rely on the stability and uniformity of particle distribution characteristic of colloids, as well as the ability of particles to be electrically charged, leading to many of their common uses.
Step-by-step explanation:
Examples of products in colloidal form include gelatin, glue, starch, dehydrated milk powder, and aerosol sprays. The essential properties of colloids that are important for these products involve the size of the particles and their uniform distribution within a medium, creating a stable system.
Gelatin, used in cooking and pharmaceuticals, relies on its ability to form a gel, which is a result of its colloidal properties - evenly dispersed particles that absorb water and swell. Glue's adhesive properties stem from its colloidal nature, allowing it to spread uniformly and adhere to surfaces upon drying. Starch in culinary uses thickens mixtures due to its colloidal particles that swell and absorb liquid, creating a consistent texture.
Dehydrated milk powder is formed by spray drying milk into fine particles that are of colloidal size, ensuring that they dissolve well when rehydrated. Aerosol sprays produce colloidal dispersions of liquid in air, which is essential for a fine, even distribution of the product when sprayed, such as in perfumes, deodorants, and cooking oil sprays.
These technological applications of colloids are extensive due to the unique interactions between their dispersed particles and the dispersion medium, often resulting in electrically charged particles that contribute to their stability and function.