Chemistry - Grade 10 - Chapter 1 1.1.What is Chemistry? 1.1.What - PowerPoint PPT Presentation

Chemistry - Grade 10 - Chapter 1  1.1.What is Chemistry?  1.1.What are the 5 areas of Chemistry?  1.1. How are pure and applied chemistry related?  1.1.Why we study Chemistry?

1.1.What is Chemistry?  Chemistry is the study of the composition of matter and the changes the matter undergoes.  Because living and nonliving things are made of matter, Chemistry affects all aspects of life and most natural events.  Chemistry can explain why some food taste sweet and some taste sour. It can even explain why there are different shampoos for dry or oily hair.  Chemical changes that occur in leaves can cause brilliant displays of color.

1.1.What are the 5 areas of Chemistry?  There are five areas of study are organic chemistry, inorganic chemistry, biochemistry, analytical chemistry, and physical chemistry.  Organic Chemistry is defined as the study of all chemicals containing carbon.  Inorganic chemistry is the study of chemicals that do not contain carbon. (mainly in non-living things, such as rocks and minerals).  Biochemistry is the study of processes that take place in organisms.  Analytical Chemistry is the area of study that focuses on the composition of matter.  Physical Chemistry is the area that deals with the mechanism, the rate, and the energy transfer that occurs when matter undergoes a change.

 A chemist is likely to be working in more than one area of chemistry at any given time.

1.1. How are pure and applied chemistry related?  Some Chemists enjoy doing research on fundamental aspects of chemistry. This type of research is sometimes called pure chemistry.  Pure chemistry is the pursuit (tracking) of chemical knowledge for its own sake. 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.  Pure research can lead directly to an application, but an application can exist before research is done to explain how it works.

 Pure chemistry: helped chemists to  Applied chemistry: Because the understand the structure of supply for natural silk was limited, materials. scientists and engineers were eager  Example: Nylon (long, thin, silk-like to apply researches related to the fibers). production of nylon and they came up with a large scale method for making nylon fibers.  Example: Production of backpacks, toothbrushes bristles, etc.

1.1.Why we study Chemistry?  Explaining the natural world: Chemistry can help you understand how things work. Chemistry explains why peeled applies turn brown when exposed to air, why water expands as it freezes why sugar dissolves faster in hot water, .. Etc.  Preparing people for career opportunities: chemistry is involved in the majority of jobs that contributes in building a successful society.  Being an informed citizen: Knowledge of chemistry and other sciences can help you evaluate the data presented and take appropriate actions.