Domanda del libro di testo
(b) Write the half-reaction that occurs at a hydrogen electrode in acidic aqueous solution when it serves as the anode of a voltaic cell.
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Ch.20 - Electrochemistry
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement146
- Ch.2 - Atoms, Molecules, and Ions200
- Ch.3 - Chemical Reactions and Reaction Stoichiometry176
- Ch.4 - Reactions in Aqueous Solution155
- Ch.5 - Thermochemistry126
- Ch.6 - Electronic Structure of Atoms131
- Ch.7 - Periodic Properties of the Elements126
- Ch.8 - Basic Concepts of Chemical Bonding123
- Ch.9 - Molecular Geometry and Bonding Theories143
- Ch.10 - Gases147
- Ch.11 - Liquids and Intermolecular Forces91
- Ch.12 - Solids and Modern Materials122
- Ch.13 - Properties of Solutions126
- Ch.14 - Chemical Kinetics174
- Ch.15 - Chemical Equilibrium101
- Ch.16 - Acid-Base Equilibria139
- Ch.17 - Additional Aspects of Aqueous Equilibria146
- Ch.18 - Chemistry of the Environment72
- Ch.19 - Chemical Thermodynamics129
- Ch.20 - Electrochemistry142
- Ch.21 - Nuclear Chemistry101
- Ch.22 - Chemistry of the Nonmetals68
- Ch.23 - Transition Metals and Coordination Chemistry66
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry10
Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970Non è quello che usi tu?Cambia libro di testo
Capitolo 20, Problema 40a
A voltaic cell that uses the reaction PdCl42-(aq) + Cd(s) → Pd(s) + 4 Cl-(aq) + Cd2+(aq) has a measured standard cell potential of +1.03 V. (a) Write the two half-cell reactions.
Guida verificata passo dopo passo1
Identify the oxidation and reduction components of the overall reaction. In this case, PdCl4^2- is reduced to Pd, and Cd is oxidized to Cd^2+.
Write the reduction half-reaction. Since PdCl4^2- is reduced to Pd, the palladium ion gains electrons. The equation will show the reduction of PdCl4^2- to Pd with the release of Cl^- ions.
Balance the reduction half-reaction for atoms other than hydrogen and oxygen. Ensure that the number of Pd and Cl atoms are equal on both sides of the equation.
Write the oxidation half-reaction. Since Cd is oxidized to Cd^2+, the cadmium metal loses electrons. The equation will show Cd transforming into Cd^2+.
Balance the oxidation half-reaction for atoms and charge. Ensure that the number of Cd atoms and the overall charge are equal on both sides of the equation.
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Half-Cell Reactions
Half-cell reactions represent the oxidation and reduction processes occurring in a voltaic cell. Each half-cell reaction shows the transfer of electrons, with one species being oxidized (losing electrons) and another being reduced (gaining electrons). In the given reaction, identifying the species that undergo oxidation and reduction is essential for writing the half-cell reactions.
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01:49
First-Order Half-Life
Standard Cell Potential
The standard cell potential (E°) is the measure of the voltage produced by a voltaic cell under standard conditions (1 M concentration, 1 atm pressure, and 25°C). It indicates the driving force behind the electrochemical reaction, with positive values suggesting a spontaneous reaction. Understanding how to interpret and calculate standard cell potentials is crucial for analyzing the overall cell reaction.
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01:27Standard Cell Potential
Electrochemical Series
The electrochemical series is a list of standard electrode potentials for various half-reactions, arranged from the most positive to the most negative. This series helps predict the direction of electron flow in a voltaic cell and the feasibility of reactions. By comparing the standard potentials of the half-reactions involved, one can determine which species will be oxidized and which will be reduced in the cell.
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Percorso guidato
02:46Electrochemical Cells
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Domanda del libro di testo
A voltaic cell that uses the reaction PdCl42-(aq) + Cd(s) → Pd(s) + 4 Cl-(aq) + Cd2+(aq) has a measured standard cell potential of +1.03 V. (c) Sketch the voltaic cell, label the anode and cathode, and indicate the direction of electron flow
Domanda del libro di testo
(c) Why is it impossible to measure the standard reduction potential of a single half-reaction?
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Domanda del libro di testo
Using standard reduction potentials (Appendix E), calculate the standard emf for each of the following reactions: (a) Cl21g2 + 2 I-1aq2 ¡ 2 Cl-1aq2 + I21s2
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Domanda del libro di testo
A voltaic cell that uses the reaction PdCl42-(aq) + Cd(s) → Pd(s) + 4 Cl-(aq) + Cd2+(aq) has a measured standard cell potential of +1.03 V. (b) By using data from Appendix E, determine E°red for the reaction involving Pd.
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