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Title: Basic Introduction to Chemistry (first 2 chapters of textbook)
Description: beginner level, very basic introduction and definitions
Description: beginner level, very basic introduction and definitions
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TEST on everything so far
Ch 1(sections 1-1 – 1-3 only
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Intro to energy and energy change, temperature
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1-1
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1-2
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chemistry=study of all substances and the changes that they can undergo
=>called the “central science” because it overlaps with so many sciences
why study chemisty:
-chemistry plays a role in many different areas of life; why leaves change
color, why icebergs float, how food you eat turns into muscle and sometimes
fat in your body
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Magnesium + Oxygen= compound magnesium oxide (MgO)
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Elements and compounds are pure substances
=> pure substance has unique set of chemical and physical properties
Electrolysis helps determine between elements and compounds
=>if it is compound, when electric current passes through, should be
broken into elements
2-5
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Mixture: blend of two or more pure substances
hetero and homogenous
heterogeneous mixtures composed of liquids and solids are often
separated by filtration
homogeneous cannot be separated by filtration
=> 3 techniques: distillation, crystallization, chromatography
distillation: takes advantage of differences in boiling points
crystallization is not limited to liquid solutions
chromatography=separate solution by allowing it to flow along stationary
substance
ex
Title: Basic Introduction to Chemistry (first 2 chapters of textbook)
Description: beginner level, very basic introduction and definitions
Description: beginner level, very basic introduction and definitions