# Big Idea 4 Study Guide ```Big Idea #4-Chemical Kinetics Study Guide
Reaction Rates:
1. What is a reaction rate?
2. What are the units for a rate?
3. What can a reaction rate measure?
4. Which line(s) represents the reactants and which line(s) represents the products? How do you
know?
Rate Laws:
5. How are differential rate laws determined? Do coefficients in a reaction have anything to do with
determining the overall rate law?
6. Specify the parts of a rate law, and know what there usual units are.
7. Describe the relationship between concentration and rate for first order.
8. Describe the relationship between concentration and rate for second order.
9. Describe the relationship between concentration and rate for zero order.
10. How do we determine the overall order for a reaction?
Integrated Rate Laws:
11. Zero Order: A straight line is produced when _____________________________ is graphed on the y-axis vs.
________________________ on the x-axis.
a. What is the slope equal to?
12. First Order: A straight line is produced when _____________________________ is graphed on the y-axis vs.
________________________ on the x-axis.
a. What is the slope equal to?
13. Second Order: A straight line is produced when _____________________________ is graphed on the y-axis
vs. ________________________ on the x-axis.
a. What is the slope equal to?
14. What does [A]t represent? What are the units?
15. What does [A]i represent? What are the units?
16. What does t stand for? What are the usual units?
17. What does k stand for?
Reaction Mechanism
18. What is a reaction mechanism?
19. How do we determine the overall balanced equation from the reaction mechanism?
20. How do we determine the overall rate law from the reaction mechanism?
21. How do we determine the orders for the reactants in a multi-step reaction?
22. What is an intermediate?
a. How can you identify it in a multi-step reaction mechanism?
b. Can intermediates appear in the rate law? How do we replace them if they exist in the slow
step?
Collision Model
23. What is activation energy? How is it abbreviated?
24. Contrast effective collisions vs. ineffective collisions.
25. What does orientation have to do with collisions?
26. How does increasing the temperature of a reaction affect the rate? How does it affect the rate
constant?
27. How does increasing the concentration of a reaction affect the rate? How does it affect the rate
constant?
Catalyst
28. What is a catalyst?
29. How do catalysts affect the activation energy? What does this then do to the rate?
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