Pure chemistry is the study of what something is, while applied chemistry is the application of that knowledge to a specific aim. The fundamentals of chemistry are pure chemistry and organic chemistry. Only knowing why or what something is more important than knowing what you can do with it. Pure chemistry is concerned with the question of "why is this that way" or "how does this operate," and seeks to answer it.
Applied chemistry is a branch of science concerned with understanding the fundamental chemical properties of materials and developing novel materials with precise uses. The practise of applying past knowledge to attain a goal is known as applied chemistry. Consider applied chemistry as the study and application of information with the objective of assisting (or potentially harming) people or the environment.