Introducing Reaction Mechanisms

An elementary reaction has only one activation-energy peak and one activated complex.

What is the molecularity of the elementary step shown here?

Which of the following elementary steps would be classified as a termolecular step?

A series of elementary steps that lead to an overall reaction is called a(n) ....

How many elementary steps are in the reaction mechanism shown here?

Which is the rate determining step in the mechanism shown below?

Step 1: A + B→ D (fast)

Step 2: A + F → C + E (slow)

Step 3: B + E → D + F (fast)

A possible mechanism for the overall reaction A + 2B → C + D

is shown below :

2B → E (slow)

A + E → C + D (fast)

If additional A is added to the reaction container, what effect will it have on the reaction rate?

A possible mechanism for the overall reaction A + 2B → C + D

is shown below :

2B → E (slow)

A + E → C + D (fast)

If the initial molarity of B is increased, what effect will this have on the reaction rate?

The following reaction mechanism has been proposed:

A + B → AB + D (slow)

A + AB → C (fast)

What is the overall reaction?

The following reaction mechanism has been proposed:

A + B → AB + D (slow)

A + AB → C (fast)

Identify the intermediate in the mechanism.

The reaction 4 HBr + O₂ ⟶ 2 H₂O + 2 Br₂

was found experimentally to have the following rate law:

rate = k[HBr][O₂]

Is the proposed mechanism consistent with the experimental rate law?

Which step would you expect to be the rate limiting step for the reaction profile shown here?

A possible mechanism for the overall reaction A + 2B → C + D

is shown below :

2B → E (slow)

A + E → C + D (fast)

Which of the following reaction profiles corresponds to the mechanism shown?

Which reaction mechanism is most likely to have the reaction pathway diagram shown above?

Which letter(s) represent transition states?

Which letter(s) represent reaction intermediates?

Which step would be the rate-determining step?