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: What is the rate law for the overall reaction 2HgCl2 + C2O42- => 2Cl-- + 2CO2 + Hg2Cl2 given the following mechanism?1. HgCl2 + C2O42- <=> HgCl2C2O42- (fast, equilibrium)2. HgCl2C2O42- + C2O42- => Hg + 2Cl-- + CO2 + C2O4CO22- (slow)3. Hg + HgCl2 => Hg2Cl2 (fast)4. C2O4CO22- => C2O42- + CO2 (fast)a.rate = k [C2O4CO22-]b. rate = k [HgCl2][C2O42- ]c. rate = k [HgCl2][Hg]d. rate = k [HgCl2][C2O42- ]e. rate = k [HgCl2C2O42-][C2O42-]

Problem

What is the rate law for the overall reaction 2HgCl2 + C2O42- => 2Cl-- + 2CO2 + Hg2Cl2 given the following mechanism?

1. HgCl2 + C2O42- <=> HgCl2C2O42- (fast, equilibrium)

2. HgCl2C2O42- + C2O42- => Hg + 2Cl-- + CO2 + C2O4CO22- (slow)

3. Hg + HgCl2 => Hg2Cl2 (fast)

4. C2O4CO22- => C2O42- + CO2 (fast)

a.rate = k [C2O4CO22-]

b. rate = k [HgCl2][C2O42- ]

c. rate = k [HgCl2][Hg]

d. rate = k [HgCl2][C2O42- ]

e. rate = k [HgCl2C2O42-][C2O42-]

Solution

Determine the overall order of the reaction by analyzing the provided elementary reactions:

1. HgCl2 + C2O42-  HgCl2C2O42- (fast, equilibrium)

2. HgCl2C2O42- + C2O42- Hg + 2Cl-- + CO2 + C2O4CO22- (slow)

3. Hg + HgCl2 Hg2Cl2 (fast)

4. C2O4CO22- → C2O42- + CO2 (fast)

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