A reaction in which A, B, and C react to form products is zero order in A, one-h
ID: 885948 • Letter: A
Question
A reaction in which A, B, and C react to form products is zero order in A, one-half order in B, and second order in C.
1. Write a rate law for the reaction.
2. What is the overall order of the reaction?
Express your answer numerically.
3. By what factor does the reaction rate change if [A] is doubled (and the other reactant concentrations are held constant)?
Express your answer numerically.
4. By what factor does the reaction rate change if [B] is doubled (and the other reactant concentrations are held constant)?
Express your answer numerically.
5. By what factor does the reaction rate change if [C] is doubled (and the other reactant concentrations are held constant)?
Express your answer numerically.
6. By what factor does the reaction rate change if the concentrations of all three reactants are doubled?
Express your answer numerically.
A. Rate=k [A] [B]2 [C]1/2 B. Rate=k [B] [C]1/2 C. Rate=k [B]1/2 [C]2 D. Rate=k [A] [B]1/2 [C]Explanation / Answer
1.
Rate=k [B]1/2 [C]2
Answer: C
2.
Overall order = 0 + 1/2 + 2 = 2 + 1/2 = 5/2 = 2.5
3.
Since rate is independent of A, rate will not change
4.
Doubling B will reduce the rate to half
since rate is directly propertional to [B]^1/2
5.
Doubline C will make the rate 4 times.
since rate is directly propertional to [C]^2
6.
Since B and C both are doubled, they weill negate each other and rate will not change
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