Ch.13 - Chemical KineticsWorksheetSee all chapters
All Chapters
Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: The oxidation of iron (II) ions by iodine in aqueous solution occurs as shown below 2 Fe2+ (aq) + l2 (aq) → 2 Fe3+ (aq) + 2 l - (aq) and the experimental rate law is found to be: Rate = k [Fe2+][I2] The proposed mechanism shown below is a valid choice for this reaction: Fe2+ (aq) + I2 (aq) → Fe3+ (aq) + I2 - (aq) Fe2+ (aq) + I2 - (aq) → Fe3+ (aq) + 2 I - (aq) Which of the following statements is true about the proposed reaction mechanism? a. I2- is the catalyst in this mechanism. b. Fe3+ is the intermediate in this mechanism c. The second step  is the rate determing step. d. The rate determining step is bimolecular e. The reaction is first order overall.    

Problem

The oxidation of iron (II) ions by iodine in aqueous solution occurs as shown below

2 Fe2+ (aq) + l2 (aq) → 2 Fe3+ (aq) + 2 l - (aq)

and the experimental rate law is found to be:

Rate = k [Fe2+][I2]

The proposed mechanism shown below is a valid choice for this reaction:

Fe2+ (aq) + I2 (aq) → Fe3+ (aq) + I2 - (aq)

Fe2+ (aq) + I- (aq) → Fe3+ (aq) + 2 I - (aq)

Which of the following statements is true about the proposed reaction mechanism?

a. I2- is the catalyst in this mechanism.

b. Fe3+ is the intermediate in this mechanism

c. The second step  is the rate determing step.

d. The rate determining step is bimolecular

e. The reaction is first order overall.