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17 Cards in this Set
- Front
- Back
precipitate
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when 2 liquid solutions are added together and a white solid is formed (snow)
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Color change
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When 2 colorless solutions are combined and a colorful product is produced
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insoluable
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doesn't desolve
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gas formation
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when gas is released as a result of a chemical reaction
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release of energy
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many chemical reactions give off some type of energy, light is one form;heat is another (glowstick) (fireworks)
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Law of Conservation of Matter and Energy
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Matter and energy cannot be created nor destroyed
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Energy is neither a reactant nor a product. Why?
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Energy is not a substance... can't touch this...
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What do coefficients indicate?
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How many atoms or molecules of a substance are involved in a reaction
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What do subscripts indicate?
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how many atoms of an element are present in a molecule and cannot be changed to balance a chemical equation
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What is the 1st step of a chemical reaction?
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The breaking of bonds
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How does temp affect reaction rate?
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Increase in temp makes particles move faster. THey collide with more energy so more of them react
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How does surface area affect reaction rate?
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Greater surface area means more reactant particles contact eachother and react
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How does concentration affect reaction rate?
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More particles in a certain space means more collisions and reactions
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diatomic molecules
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2 atoms covalently bonded
- 7: H,O,F,Cl,Br,I,N |
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What are the 4 signs of evidence for a reaction
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1) precipitate
2) color change 3) gas formation 4) release of energy |
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When I add a glowstick to cold H2O it
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slows the reactant particles E
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When I add a glowstick to hot H2O it
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speeds up particle's E (gets brighter)
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