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This quiz contains 6 questions from a mix of 1 subtopics.
The step in a multi-step reaction is called the rate-determining step.
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Which step in a multi-step reaction is the slowest?
the first step
the rate-determining step
all steps have the same rate
the last step
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The two-step mechanism for the hydrolysis of a tertiary halogenoalkane is shown below:
Step 1: (CH3)3CBr ➔ (CH3)3C+ + Br- slow
Step 2: (CH3)3C+ + OH- ➔ (CH3)3COH fast
Which rate equation is consistent with this reaction mechanism?
rate = k[(CH3)3CBr]
rate = k[(CH3)3C+]
rate = k[(CH3)3CBr][OH-]
rate = k[(CH3)3C+][OH-]
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What is an intermediate in a reaction mechanism?
a reactant
a species formed in one step and used up in another step
a species that determines the rate equation
a product
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The two-step mechanism for the hydrolysis of a tertiary halogenoalkane is shown below:
Step 1: (CH3)3CBr ➔ (CH3)3C+ + Br- slow
Step 2: (CH3)3C+ + OH- ➔ (CH3)3COH fast
What statement is true about the (CH3)3C+ species?
it is a reactant
it is a catalyst
it is an intermediate
it is a product
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The three-step mechanism for the decomposition of dinitrogen pentoxide is shown below:
Step 1: N2O5(g) ➔ NO2(g) + NO3(g)
Step 2: NO2(g) + NO3(g) ➔ NO(g) + NO2(g) + O2(g)
Step 3: NO(g) + NO3(g) ➔ 2NO2(g)
The rate equation for the following reaction is: rate = k[N2O5].
Which step is the rate-determining step?
step 2
step 1
step 3
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