Rates of Reactions

Flashcard
•
Chemistry
•
10th - 12th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
What happens to the rate of a reaction when the concentration of reactants is increased?
Back
The rate of the reaction increases.
2.
FLASHCARD QUESTION
Front
What two factors determine if a collision between reacting particles will be effective?
Back
Energy and orientation.
3.
FLASHCARD QUESTION
Front
How does smaller particle size affect the surface area available for a reaction?
Back
Smaller particle size allows for a larger surface area to be exposed for the reaction.
4.
FLASHCARD QUESTION
Front
Why does increasing temperature lead to a faster reaction rate?
Back
It increases both the frequency and energy of particle collisions.
5.
FLASHCARD QUESTION
Front
What are the factors that can increase the rate of a reaction?
Back
Increasing temperature, increasing concentration, increasing surface area.
6.
FLASHCARD QUESTION
Front
Define 'activation energy'.
Back
The minimum energy required for a chemical reaction to occur.
7.
FLASHCARD QUESTION
Front
What is the effect of a catalyst on a chemical reaction?
Back
A catalyst increases the rate of a reaction by lowering the activation energy.
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