👉 In the context of chemical engineering, "premixed" refers to a process where two or more chemicals are mixed together in a container that is not designed for mixing. This mixture is then subjected to heating and/or cooling to achieve its desired reaction conditions. For example, in the case of an aqueous solution, it's common to mix two or more solutions (e.g., water and sodium hydroxide) to create a solution with a pH between 7 and 14. The mixing
