Pure chemistry is the pursuit of chemical knowledge for its own sake. The chemist doesn’t expect that there will be any immediate practical use for the knowledge. Most chemists do research that is designed to answer a specific question. Applied chemistry is research that is directed toward a practical goal or application.
Work Step by Step
Research can lead to application. On the other hand, application can happen before any research is done to explain how it works. Pure research can lead directly to an application, but an application can exist before research is done to explain how it works.