1. All the following are reaction rate units except
a. ∆M s-1
b. -∆M s-1
c. ∆V M-1 ***
d. ∆M min-1
2. Determine the overall reaction order for the reaction whose rate law is as follows: rate=k[O3][ClO]:
a. 0
b. 1 ***
c. 2
d. 3
3. 0.03 moles are produced in a 1.5-L vessel in 3 seconds. The initial reaction rate is
a. 0.007 M/s
b. 0.014 M/s ***
c. 0.14 M/s
d. 200 M/s
2 answers
I need help. I don't understand reaction orders.
2. The order of a reaction is the sum of the exponents for each reactant in the rate equation. I see a 1 for each so it is 1st order with respect to ClO^- and 1st order with respect to O3 and 2nd order overall.
3. Note that the units for each answer is the same; i.e., M/s which is mols/L*s.
You have 0.03 mols and 1.5 L so that is 0.03 mols/1.5L = 0.02 mol/L and that is for 3 sec so 0.02 mol/L*s = 0.02/3 = 0.00667 which rounds to 0.007 M/s to one significant figure.
3. Note that the units for each answer is the same; i.e., M/s which is mols/L*s.
You have 0.03 mols and 1.5 L so that is 0.03 mols/1.5L = 0.02 mol/L and that is for 3 sec so 0.02 mol/L*s = 0.02/3 = 0.00667 which rounds to 0.007 M/s to one significant figure.
1 answer