# Problem: When the concentration of A is doubled, the rate for the reaction: 2 A + B → 2 C quadruples.When the concentration of B is doubled the rate remains the same. Which mechanism below is consistent with the experimental observations?      A) Step 1:  A + B → D (slow)Step 2:  A + D → 2 C (fast)      B) Step 1:   A → D (slow)Step 2:  A + B + D → E (fast)Step 3:  E → 2 C (fast) C) Step 1:  2 A → D (slow)Step 2:  B + D → E (fast)Step 3:  E → 2 C (fast)      D) Step 1:  A + B → D (slow)Step 2:  A + D ⇌ 2 C (fast equilibrium)

🤓 Based on our data, we think this question is relevant for Professor Moussa's class at VCU.

###### FREE Expert Solution

We’re being asked to determine the reaction mechanism that is consistent with the given experimental observations for this reaction:

2 A + B  2 C

Recall that a reaction mechanism is a sequence of single steps that add up to the chemical reaction

The rate law of the reaction depends on the rate-determining step of the mechanism, which is the slow step in the mechanism

###### Problem Details

When the concentration of A is doubled, the rate for the reaction: 2 A + B → 2 C quadruples.

When the concentration of B is doubled the rate remains the same. Which mechanism below is consistent with the experimental observations?

A) Step 1:  A + B → D (slow)

Step 2:  A + D → 2 C (fast)

B) Step 1:   A → D (slow)

Step 2:  A + B + D → E (fast)

Step 3:  E → 2 C (fast)

C) Step 1:  2 A → D (slow)

Step 2:  B + D → E (fast)

Step 3:  E → 2 C (fast)

D) Step 1:  A + B → D (slow)

Step 2:  A + D ⇌ 2 C (fast equilibrium)

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Reaction Mechanism concept. If you need more Reaction Mechanism practice, you can also practice Reaction Mechanism practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofWhen the concentration of A is doubled, the rate for the rea...as low difficulty.

How long does this problem take to solve?

Our expert Chemistry tutor, Jules took 2 minutes and 33 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Moussa's class at VCU.