1. For the reaction 2 A + B → C, the rate of formation of C was measured for a number of different initial concentrations of A and B, with the following results:
ABRate
0.10 M 0.10 M 2.0 x 10-3 mol/L-min
0.20 M 0.10 M 8.0 x 10-3 mol/L-min
0.30 M 0.10 M 1.8 x 10-2 mol/L-min
0.20 M 0.20 M 8.0 x 10-3 mol/L-min
0.30 M 0.30 M 1.8 x 10-2 mol/L-min
1. Write the rate equation for the reaction.
2. What is the order of the reaction?
3. Calculate the specific rate constant.
2. The reaction below takes place in aqueous solution:

2 ClO2 + 2 OH- → ClO3- + ClO2- + H2O

The following initial rates were obtained for this reaction at various initial concentrations:

ClO2OH-Rate (mol/L-s)
0.10 0.20 0.46
0.20 0.20 1.84
0.20 0.10 0.92
1. Write the rate law for the reaction.
2. What is the order of the reaction?
3. What is the value of the specific rate constant?
3. The reaction of carbon dioxide with an aqueous solution in which the hydroxide ion concentration is greater than 10-4 M occurs in two steps:

CO2(aq) + OH-(aq) → HCO3- (aq) slow
HCO3-(aq) + OH-(aq) → CO32-(aq) + H2O(l) fast

1. Write a rate equation for the disappearance of CO2.
2. The rate constant for the reaction is 8500 L/mol-s. If the OH- concentration is 2.2 x 10-4 M and the CO2 concentration is 0.44 g/L, calculate the rate of the reaction.
4. The reaction 2 NO2(g) → N2O4(g) occurs directly in a single step. If N2O4 is formed at the rate of 0.500 mol/L-min when the concentration of NO2 is 2.00 mol/L, what is the rate of formation of N2O4 when the concentration of NO2 is 1.00 mol/L? (Assume that the temperature remains constant.)
5. For which reaction, A or B, are the following true?

(A) CH3Cl + OH- → CH3OH + Cl-
(B) (CH3)3CCl + OH- → (CH3)3COH + Cl-

1. The reaction is second-order overall
2. The reaction has a two-step mechanism
3. The reaction proceeds through an intermediate with a positive charge
4. The transition state of the rate-determining step contains both OH and Cl partially bonded to carbon
5. The reaction has two transition states
6. Give a correctly labeled reaction profile for the reaction

(CH3)3CCl + OH- → (CH3)3COH + Cl-

• Introduction
• Chapter 1
• Chapter 2
• Chapter 3
• Chapter 4
• Chapter 5
• Chapter 6
• Chapter 7
• Chapter 8
• Chapter 9
• Chapter 10
• Chapter 11
• Chapter 12
• Chapter 13
• Chapter 14
• Chapter 15
• Chapter 16
• Chapter 17
• Chapter 18