pure substance: type of matter with a fixed composition ... · ch 4 ps mixtures solutions...
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Ch 4 PS Mixtures solutions elements.notebook
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Pure Substance:
Type of matter with a fixed composition
Elements and Compounds!
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Class Notes MatterMatter
HeterogenousHomogenouselements compounds
MixturesPure Substances
Mixtures -2 or more pure substances mixed, but not chemically combined.
* Substances can be in any amount* Can be seperated by physical means ex: raisins in raisin bran
TWO KINDS OF MIXTURES:Heterogeneous Mixture: Mixture that doesn't appear to be the same throughout ex: sand in waterHomogeneous Mixture: appears to be the same throughout ex: homogenized milk
Colloid: Homogeneous mixture, the parts aren't dissolved, remain suspended, beam of light seen as it shines through it (cloudy) ex: mayonnaise, fog Solution: Homogeneous mixture in a single physical state (dissolved) ex: tea (liquid) alloy: solution of metals (solid)
Stainless steel = Iron + Chromium
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MIXTURES:Heterogenous
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Homogenous:COLLOIDS
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Homogenous: COLLOIDS THEY SCATTER LIGHT RAYS
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SOLUTIONSMixtures: Homogenous
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ALLOYS:SOLUTION OF METALS
BRASS = COPPER AND ZINC
BRONZE=COPPER AND TIN
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Solvent: substance that does the dissolvingSolute: substance that is dissolvedWhich is Which? solute solventOcean waterSeltzer waterLemonade
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What is SOLUBILITY?SOLUBILITY IS
The maximum amount of solute that can be dissolved in an given amount of solvent at a given temperature.
THINK!WHAT CAN INCREASE SOLUBILITY?
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• Temperature • Temperature
• Temperature