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17 Cards in this Set

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