what is chemistry chemistry is the study of the composition of matter – the stuff things are made...
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Chapter 1Introduction to Chemistry
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What is ChemistryChemistry is the study of the composition of matter – the stuff things are made of – and the changes that matter undergoes. Japanese symbol means, “change study”
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Some things in Chemistry are used practically everyday
Some things in Chemistry are theoretical now, but may become practical tomorrow
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There are 5 major areas of study: Organic – the study of essentially all substances containing carbon
Inorganic – specializes on substances that do not contain carbon
Analytical – is concerned with the composition of substances
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Studies continued…Physical – is concerned with theories and experiments that describe the behavior of chemicals
Biochemistry – the study of the chemistry of living organisms
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Why study Chemistry?Chemistry is all around you. Clothing, home, work, school, nature
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How do you know a chemical reaction has occurred?Change in colorProduction of a gasEmission of a lightChange in heat/NRG – gets hot or cold
Production of a precipitate (ppt)
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Chemistry Far and WideUse chemistry to our advantage – produce iron from iron ore, mixtures of brass and bronze, and polymers to plastics, paints, etc.
NRG - Increasing demands means discovering new ways to provide NRG. Chemists are working on alternative fuel sources and developing NRG efficient cars, appliances, etc.
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Areas where Chemistry is usedMedicine and Biotechnology
Drugs and cures
AgricultureFood supply and safer pesticides
The environmentIdentify pollutants, global warming
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Areas continued…
Astronomy and space explorationAnalyze atmospheres on other planets; geologists learn what types of rocks make up other planets, etc.
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Thinking Like a Scientist
The Scientific MethodA way of answering questionsTable on page 16 – outlines the steps of the scientific method
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Scientific MethodObservation/Question – Research what you know
Hypothesis – educated guessExperimentCollection of DataConclusionRedo experiment
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Scientific method continued…Scientific Law is a concise statement that summarizes the results of many observations and experiments.
Natural law – brings together many observations to see the “big picture”
Theory – a model – provides an explanation, can predict the outcome of future experiments.
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How to Study ChemistryUnderstanding and applying conceptsLearn the language of science
Based on facts obtained from making observations and doing experiments
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How to Study Chemistry continued…
Use your textbook – it is an aid, to get the most out of your reading you should always take notes.
Why? Because by taking notes you retain information better.
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How to Study Chemistry continued…
Discuss what you learned in class with your friends/get a study buddy. You might understand a concept that you didn’t before or help your friend to understand it better.
So study, write and explain/talk, but not when others are talking.