1. 1. Consider the reaction 2A + 2B --> products. If the rate of a reaction does
ID: 874871 • Letter: 1
Question
1. 1. Consider the reaction 2A + 2B --> products. If the rate of a reaction does not change when the concentration of A is increased from 2.00 M to 6.00 M, the order of the reaction with respect to A
2. A certain reaction aA + bB --> products is 2nd order in B and zeroth order in A. Which of the following is the correct expression for the rate law of the reaction?
A. Rate = k[A]a[B]b
B. Rate = k[B]b
C.Rate = k[A][B]2
D.Rate = k[B]2
3. A certain reaction has an overall order of 1.5. Which of the following is the right unit for the rate constant?
A. M-1.5s-1
B. M0.5s-1
C. M-0.5s-1
D. M-1.5s-1
4. A certain reaction A + B --> products has the following rate law:
rate of consumption of A = k[A]3.
If the rate of consumption of A is 1.0 M/s what will be the rate when the concentration of A is doubled and that of B is also doubled?
5. A reaction A --> products has the rate law, rate = k[A]. If the rate constant of the reaction is 9.965 min-1. What is the half-life of the reaction?
6. A certain reaction A--> products has the rate law, rate = k[A]2. If the initial concentration of A is 4.00 M and the concentration of A after 2.00 min is 1.00 M, what is the rate constant?
A. 0.375 M-1min-1
B. 22.5 s-1
C. 41.6 s-1
D. 18.1 s-1
7. Consider the reaction aA + bB --> products. If the reaction rate increases from 2.00 M/s to 16.0 M/s when the concentration of A alone is increased from 2.00 M to 4.00 M, what is the order of the reaction with respect to reactant A alone?
8. The rate constant of a reaction is 2.00 s-1 at 200C and 4.00 s-1 at 400C. Calculate the activation energy for this reaction.
9. A certain reaction A--> products has the rate law, rate = k[A]2. If the initial concentration of A is 4.00 M and the rate constant of the reaction is 0.00100 M-1s-1, what will be the concentration of A after 2.00 min?
10. Consider the hypothetical reaction 2A + 3 B --> products. If the rate of consumption of A is -4.0 M/s, what will be the rate of consumption of B?
11. A certain reaction A--> products has the rate law rate = k[A]. Calculate the concentration of A remaining after 10 minutes if the initial concentration of A is 2.00 M and the rate constant of the reaction is 0.00500 s-1?
12. The reaction A--> products has the rate law, rate = k[A]. If the initial concentration of A is 10.0 M and the concentration of A is 4.00 M after 5.00s, what is the rate constant of this reaction? A. 4.58 s-1
B.0.0796 s-1
C. 0.183 s-1
D. 1.99 s-1
13. A certain reaction, A--> products has the rate law, rate = k[A]2. What is the half-life of the reaction if the rate constant of the reaction is 5.0 M-1s-1 when the concentration of A is 2.0 M?
14. The rate constant of a reactions is 2.00 s-1 at 200C. What will be the rate constant at 400C if the activation energy for the reaction is 10.0 kJ/mol?
A. 2.06 s-1
B. 2.29 x 1013 s-1
C. 2.60 s-1
D. 1.54 s-1
15. A certain reaction A --> products has the rate law rate = k[A]. If the initial concentration of A is 2.00 M and the half-life of the reaction is 2.00 min, how much time will it take for the concentration of A to drop to 0.250 M?
PLEASE, SHOW WORK OF ALL CALCULATIONS. Thanks!
Explanation / Answer
. Consider the reaction 2A + 2B --> products. If the rate of a reaction does not change when the concentration of A is increased from 2.00 M to 6.00 M, the order of the reaction with respect to A
Rate depends on the concentration change but there is no any concentration change in A so the order with respect to A is 0.
2. A certain reaction aA + bB --> products is 2nd order in B and zeroth order in A. Which of the following is the correct expression for the rate law of the reaction?
The answer is
D.Rate = k[B]2
This is because ; Rate law for above reaction is D.Rate = k[A]m [B]n . Here order m and n are the order of A and B respectively. If m = 0 then [A]m= 1 and n = 2 so
.Rate = k[B]2
3. A certain reaction has an overall order of 1.5. Which of the following is the right unit for the rate constant?
General formula to get unit of rate constant is M-(n-1) s-1
Here n = 1.5 lets plug this value for n
M-(1.5-1) S-1
M-(0.5) S-1
So the correct option is
C. M-0.5s-1
4. A certain reaction A + B --> products has the following rate law:
rate of consumption of A = k[A]3.
If the rate of consumption of A is 1.0 M/s what will be the rate when the concentration of A is doubled and that of B is also doubled?
Rate depend on the concentration of A only. And order of A.
Then rate will be 8 times greater than the initial rate and the rate will be 8.0 M/s
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