In: Chemistry
Use the following data to answer Questions 25 and 26:
A general reaction written as A + 2B ® C + 2D is studied and yields the following data:
| 
 [A]0  | 
 [B]0  | 
 Initial D[C]/Dt  | 
||
| 
 0.150 M  | 
 0.150 M  | 
 8.00 ´ 10–3 mol/L·s  | 
||
| 
 0.150 M  | 
 0.300 M  | 
 1.60 ´ 10–2 mol/L·s  | 
||
| 
 0.300 M  | 
 0.150 M  | 
 3.20 ´ 10–2 mol/L·s  | 
||
25. What is the numerical value of
the rate constant?
26. Determine the initial rate of B
consumption (D[B]/Dt) for the
first trial?
27. For a first order reaction with a rate constant k = 3.13 x 102 s-1, how long does it take for the concentration of the only reactant to become 40% of the original amount?