Chemistry and Measurements
Chemistry & Chemicals Study Plan Units of Measurement 4. Scientific Notation 5. Measured Numbers & Significant Figures 6. Significant Figures & Calculations 7. Prefixes & Equalities 8. Conversion Factors 9. Problem Solving 10. Density
1. 2. 3.
General, Organic, and Biological Chemistry
Fourth Edition Karen Timberlake
Chapter 1
Chemistry and Measurements
1.1 Chemistry and Chemicals
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Lectures
Chemistry
Chemistry is the study of matter and its composition, structure, properties, and reactions.
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3
Chemistry is Everywhere
Chemistry happens all around you, for example, when you cook food, add chlorine to your pool, digest food, and drop an antacid tablet in a glass of water.
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4
Field of Chemistry
The field of chemistry is divided into branches. General Chemistry Organic Chemistry Biochemistry
Biochemists analyze samples in a laboratory.
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Alchemists: Early Chemists
Alchemists learned to extract metal from ores, designed some of the first laboratory equipment, and developed early laboratory procedures.
Paracelsus believed that chemicals and minerals could be used as medicines.
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6
Chemicals
Chemicals are substances that always have the same composition and properties, in everything you see, and also called substances and describe a specific type of material.
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7
Common Products Contain Chemicals
Substances you use everyday contain chemicals, including shampoo, soap, and toothpaste.
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8
Chemicals Commonly Used in Toothpaste
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Chapter