1)  Given the following reaction:

 

BrO3- + 5Br- + 6H+ → 3Br2 + 3H2O

 

Experiment      Initial[BrO3-]    Initial[Br-]        Initial[H+]        Initial Rate(M/s)

1                      0.10                 0.10                 0.10                 8.0 x 10-4

2                      0.20                 0.10                 0.10                 1.6 x 10-3

3                      0.20                 0.20                 0.10                 3.2 x 10-3

4                      0.10                 0.10                 0.20                 3.2 x 10-3

· What is the rate law?

· What is the value of k?

· If we increase the bromate ion concentration by 4 times, what

happens to the reaction rate?

If we increase [H+] by 4 times?

· If [BrO3-] is 0.80 M, [Br-] is 0.30 M and [H+] is 0.40 M what is

the reaction rate?

 

2) In the reaction A + 2 B → 3 C + 4 D, the initial concentration of B was 0.0427 M after 13.3 min the concentration of B was 0.0245 M. What is the average rate of appearance (M/s) of reactant C?

 

 

 

3) A rate law is third order overall.  What are the units of the rate constant?

 

 

 

4)  A reactant in a rate law is 4th order.  By how much will the reaction rate increase if the reactant concentration is doubled?  Explain.

 

 

 

5)  In the coal-gasification process, carbon monoxide is converted to carbon dioxide via the following reaction:

 

 

In an experiment, 0.35 mol of CO and 0.40 mol of  were placed in a 1.00-L reaction vessel.  At equilibrium, there were 0.19 mol of CO remaining. at the temperature of the experiment is __________.

 

A) 5.47

B) 0.75

C) 1.78

D) 0.56

E) 1.0

6) The equilibrium constant (Kp) for the interconversion of and is 0.0121:

 

 

A vessel is charged with, giving an initial pressure of 0.123 atm. At equilibrium, the partial pressure of  is __________ atm.

 

A) 0.0782

B) 0.0455

C) 0.0908

D) 0.0330

 

7)  Will a reaction rate be greater at the beginning or end of the reaction?  Explain.

 

 

 

 

 

 

8) The rate of reaction is dependent on which of the following?

A) temperature           

B) Reactant concentration

C) the reaction itself

D) the presence of a catalyst

E) all of the above

 

9)  At equilibrium, which of the following must be equal:

 

A) the concentration of all of the reactants

B) the concentration of all of the products

C) the concentration of the reactants and products

D) the forward and reverse rates

E) the forward and reverse rate constants

 

10) Consider the following reaction

C2H4 (g) + H2 (g) →C2H6 (g)                         Kc = 0.99

What is the concentration for each substance at equilibrium if the initial

concentration