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Chemical Reactions

QuestionAnswer
Where would you find the PRODUCTS of a chemical reaction? to the right of the arrow (after the arrow)
How many carbon atoms are in one molecule of CO2? (that 2 should be subscript) ONE
Exothermic reactions _______________ energy, while endothermic reactions _______________ energy. release; absorb
If a solid comes out of a solution when two liquids are mixed, that is a sign that a chemical reaction has occurred. This is called a ___________________. precipitate
What does a catalyst do? it increases the rate of the reaction by bringing reactant particles together
Why does increasing temperature cause chemical reactions to speed up? causes particles to move faster, causing more collisions
Breaking a reactant up into smaller pieces will _____________ the rate of the reaction. speed up
Exothermic reactions feel __________. hot
Lowering the concentration of the reactions will __________ the rate of the reaction. slow down
The law of conservation of mass states that: atoms aren't created or destroyed. The atoms present before the reaction must be present after.
Because of the law of conservation of mass, we must _________________ our chemical equations. balance
What are two signs that a chemical reaction has occurred? change in odor or color; precipitate; bubbles
EXOTHERMIC or ENDOTHERMIC: the energy graph shows an increase ENDOTHERMIC (it absorbed energy)
EXOTHERMIC or ENDOTHERMIC: it gives off light EXOTHERMIC (releasing energy)
EXOTHERMIC or ENDOTHERMIC: the beaker feels cold during the reaction ENDOTHERMIC (absorbs energy from surroundings, making it feel cold)
TRUE or FALSE: In a chemical reaction, atoms are simply breaking bonds, rearranging, and forming new ones. TRUE
Created by: osmerd
 

 



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