AP MCQ 05ABCDEFGHIJK PART 3

Which of the following is a rate law, where the units of rate are equal to the units of the rate constant?

Which answer choice correctly matches the integrated rate law shown below?

1/[A]_t = k t + 1/[A]₀

A proposed mechanism for a given chemical reaction is given below.

STEP 1 (fast) A + B → J
STEP 2 (slow) J + A → C + F
STEP 3 (fast) F + A → C + D

Which combination of statements is consistent with the data above?

Questions 4-6 relate to the popular demonstration called “Elephant’s Toothpaste”, in which the mechanism is believed to be as follows.

STEP 1 H₂O₂ + I^- → H₂O + OI^-
STEP 2 H₂O₂ + OI^- → H₂O + O₂ + I^-

Question 04:

Which species is the catalyst in the reaction?

Which species is an intermediate?

Which chemical equation consistent with the mechanism provided?

A reaction of the reactants A and B, to produce products X and Y, can be summarized as;

3A + 2B → 2X + Y

The kinetics of the reaction are studied and data collected. Use the data in the table below to answer Questions 07-10.

Question 07:

What is the rate law for the reaction?

What is the value of the rate constant (with correct units)?

In experiment 3, what would be the rate of change of concentration of B measured in M sec^-1?

If Z is an intermediate, which of the following is a possible slow step in the mechanism?