Chapter 12, Problem 119CP

The following data were collected in two studies of the reaction

$2\text{A}+\text{B}\to \text{C}+\text{D}$

Time (s)	Experiment 1 [A] (mol/L) × 10−2	Experiment 2 [A] (mol/L) × 10−2
0	10.0	10.0
20.	6.67	5.00
40.	5.00	3.33
60.	4.00	2.50
80.	3.33	2.00
100.	2.86	1.67
120.	2.50	1.43

In Experiment 1, [B]₀ = 5.0 M.

In Experiment 2, [B]₀ = 10.0 M.

$\text{Rate}=\frac{-\Delta [A]}{\Delta t}$

a. Why is [B] much greater than [A]?

b. Give the rate law and value for k for this reaction.