bell ringer - mr. sproles
TRANSCRIPT
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Bell Ringer
Which of the following is different than the others?
a. Brass
b. Salt water
c. Pizza
d. copper
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A B
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A B
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A B
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A B
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MIXTURES
Blend of 2 or more kinds of matter, each of which retains its own identity and properties
1. Heterogeneous Mixture –NOT UNIFORM throughout
2. Homogeneous Mixture –UNIFORM throughout –Also known as SOLUTIONS
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Mixtures do not:
Have constant boiling points
Have constant melting points
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(Mostly nitrogen & oxygen)
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B A
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B A
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B A
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B A
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B A
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In Summary: Complete the “Classification of Matter” Graphic Organizer
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Separation Methods
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Separation Techniques
• Filtration- solid part is trapped by filter paper and the liquid part runs through the paper
• Example: making coffee
Separating precipitate from solution
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Separation Techniques
• Decanting- when liquid is poured off after solid has settled to bottom
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Separation Techniques
• Centrifuge- machine that spins a sample very quickly so that components with different densities will separate
• Evaporation- where the liquid portion is
evaporated off to leave solid
Example: separating salt and water in salt
water solution
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Distillation to separate a pure liquid from dissolved solid impurities which have a very high boiling point.
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Separating funnel
A device used to
separate heavy liquid
from lighter liquids
Also used for
extractions of mixture
components based on
solubility.
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Separation Techniques
• Paper Chromatography- used to separate mixtures because different parts move quicker on paper than others based on solubility in mobile phase and attraction to stationary phase
• (more info later in lab)
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End of notes
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Exit Slip What is titanium?
a. Heterogeneous mixture
b. Homogeneous mixture
c. Compound
d. element