1. what are the types of pure substances? 2. what is the difference between an element and a...
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Mixtures vs. Compounds All Matter Pure Substance ElementCompound Mixture - Made up of only 1 kind of matter - Has uniform and definite composition - simplest form - cannot be divided - 2 or more different elements chemically combined - 2 or more pure substances physically blended togetherTRANSCRIPT
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Warm Up – 9/18
1. What are the types of pure substances?
2. What is the difference between an element and a compound?
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2.3 Mixtures UNIT 2 Matter and Change
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Mixtures vs. CompoundsAll Matter
Pure Substance
Element Compound
Mixture- Made up of only 1
kind of matter- Has uniform and definite composition
- simplest
form- cannot
be divided
- 2 or more different elements
chemically combined
- 2 or more pure substances physically blended together
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Element Compound
Mixture
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Compounds vs Mixtures
1. Create a new form of matter with unique properties
2. Fixed/definite compositionEx: Aspirin is always 60% Carbon, 35.5% Oxygen and 4.5% Hydrogen.
3. Can only be separated be a chemical change Color, size, solubility, odor,
density, freezing, melting, or boiling points
1. Combine properties of its parts Ex: Red + White = pink
2. Ratio between parts can varyEx: Concrete may be 90% sand or 85% or even 1%
3. Can be separated by physical properties
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Mixtures vs. CompoundsAll Matter
Pure Substance
Element
Compound
Mixture
Homogenous
Heterogenous
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Homogeneous Mixtures have a uniform composition throughout
Ex: gasoline, syrup, air and metal alloys like gold, steel or brass
Homogeneous mixtures are also called solutions
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Heterogeneous Mixtures are not uniform in composition
Ex: orange juice, chocolate chip cookies, lucky charms, Italian dressing, salads
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Homogeneous or Heterogeneous?
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Phases A uniform part with the same
properties Since Homogeneous mixtures are
uniform throughout they only have 1 part or phase
Heterogeneous mixtures have 2 or more distinct parts or phases
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For separating liquids… use DISTILLATION
For separating liquids from solids…use FILTRATION
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PracticePure Substance or Mixture? 1. Air 2. cobalt 3. Carbon Dioxide 4. Salt water 5. granite 6. Raisin Bran cereal
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PracticeHomogeneous or Heterogeneous? 1. Blood 2. Apple 3. Oil and water 4. Raisin Bran 5. Granite 6. Tea