Ch.18 - ElectrochemistryWorksheetSee 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: Calculate ΔG°rxn and K for each reaction. a. The reaction of Cr2+(aq) with Cr 2O72– (aq) in acid solution to form Cr 3+(aq). b. The reaction of Cr3+(aq) and Cr(s) to form Cr 2+(aq). [The electrode potential of Cr 2+(aq) to Cr(s) is –0.91 V.]

Problem

Calculate ΔG°rxn and K for each reaction.
a. The reaction of Cr2+(aq) with Cr 2O72– (aq) in acid solution to form Cr 3+(aq).
b. The reaction of Cr3+(aq) and Cr(s) to form Cr 2+(aq). [The electrode potential of Cr 2+(aq) to Cr(s) is –0.91 V.]