Domanda del libro di testo
From each of the following pairs of substances, use data in Appendix E to choose the one that is the stronger reducing agent: (a) Fe(s) or Mg(s) (b) Ca(s) or Al(s) (c) H2(g, acidic solution) or H2S(g)
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Ch.20 - Electrochemistry
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232
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TOC.tableOfContents
- Ch.1 - Introduction: Matter, Energy, and Measurement177
- Ch.2 - Atoms, Molecules, and Ions231
- Ch.3 - Chemical Reactions and Reaction Stoichiometry216
- Ch.4 - Reactions in Aqueous Solution189
- Ch.5 - Thermochemistry175
- Ch.6 - Electronic Structure of Atoms168
- Ch.7 - Periodic Properties of the Elements150
- Ch.8 - Basic Concepts of Chemical Bonding177
- Ch.9 - Molecular Geometry and Bonding Theories200
- Ch.10 - Gases179
- Ch.11 - Liquids and Intermolecular Forces113
- Ch.12 - Solids and Modern Materials154
- Ch.13 - Properties of Solutions157
- Ch.14 - Chemical Kinetics199
- Ch.15 - Chemical Equilibrium128
- Ch.16 - Acid-Base Equilibria164
- Ch.17 - Additional Aspects of Aqueous Equilibria163
- Ch.18 - Chemistry of the Environment105
- Ch.19 - Chemical Thermodynamics164
- Ch.20 - Electrochemistry171
- Ch.21 - Nuclear Chemistry122
- Ch.22 - Chemistry of the Nonmetals82
- Ch.23 - Transition Metals and Coordination Chemistry79
- Ch.24 - The Chemistry of Life: Organic and Biological Chemistry16
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Capitolo 20, Problema 45a,b,c
By using the data in Appendix E, determine whether each of the following substances is likely to serve as an oxidant or a reductant: (a) Cl2(g), (b) MnO4- (aq, acidic solution), (c) Ba(s)
Guida verificata passo dopo passo1
Identify the half-reaction for \( \text{MnO}_4^- \) in an acidic solution from Appendix E, which typically involves the reduction of \( \text{MnO}_4^- \) to \( \text{Mn}^{2+} \).
Write the balanced half-reaction for the reduction of \( \text{MnO}_4^- \) in acidic solution: \( \text{MnO}_4^- + 8\text{H}^+ + 5\text{e}^- \rightarrow \text{Mn}^{2+} + 4\text{H}_2\text{O} \).
Look up the standard reduction potential \( E^0 \) for this half-reaction in Appendix E.
Determine if the \( E^0 \) value is positive, which indicates that \( \text{MnO}_4^- \) is a strong oxidizing agent (oxidant) because it readily gains electrons.
Conclude that if the \( E^0 \) value is positive, \( \text{MnO}_4^- \) is likely to serve as an oxidant in an acidic solution.
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Oxidation and Reduction
Oxidation and reduction are chemical processes that involve the transfer of electrons between substances. Oxidation refers to the loss of electrons, while reduction involves the gain of electrons. In redox reactions, one species is oxidized and another is reduced, which is essential for understanding the roles of oxidants and reductants.
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01:53
Oxidation and Reduction Reactions
Oxidizing and Reducing Agents
An oxidizing agent, or oxidant, is a substance that causes another substance to be oxidized by accepting electrons, while a reducing agent, or reductant, donates electrons to reduce another substance. Identifying whether a substance acts as an oxidant or reductant is crucial for predicting the outcome of redox reactions.
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01:01Oxidizing and Reducing Agents
Standard Reduction Potentials
Standard reduction potentials are measured values that indicate the tendency of a species to gain electrons and be reduced. These values, typically found in tables, help determine the strength of oxidizing and reducing agents. A higher standard reduction potential suggests a stronger oxidant, while a lower value indicates a stronger reductant.
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01:10Standard Reduction Potentials
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