Domanda del libro di testo
(a) Which region of the periodic table shown here contains elements that are easiest to oxidize? (b) Which region contains the least readily oxidized elements?
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Ch.4 - Reactions in Aqueous Solution
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 4, Problema 45
True or false: (a) If a substance is oxidized, there must be more oxygen in the substance.
Guida verificata passo dopo passo1
Understand the concept of oxidation: Oxidation is a chemical process where a substance loses electrons. It does not necessarily involve the addition of oxygen.
Consider the historical context: Historically, oxidation was associated with the addition of oxygen, but in modern chemistry, it is defined by the loss of electrons.
Evaluate the statement: The statement suggests that oxidation always involves more oxygen in the substance, which is not true in the context of electron transfer.
Provide an example: For instance, when iron rusts, it combines with oxygen, but in other oxidation reactions, such as the oxidation of hydrogen to form protons, no oxygen is involved.
Conclude the analysis: Therefore, the statement is false because oxidation is defined by electron loss, not necessarily by the presence of oxygen.
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Oxidation and Reduction
Oxidation refers to the loss of electrons by a substance, while reduction is the gain of electrons. These processes are part of redox reactions, where one species is oxidized and another is reduced. Importantly, oxidation does not necessarily involve the addition of oxygen; it can occur through the loss of hydrogen or electrons.
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01:53
Oxidation and Reduction Reactions
Oxygen's Role in Oxidation
While oxygen is commonly associated with oxidation, it is not a requirement for a substance to be oxidized. Oxidation can occur in reactions where oxygen is absent, such as in the case of metals reacting with halogens. Therefore, the presence of more oxygen does not define whether a substance is oxidized.
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00:58Oxide Reactions
Stoichiometry in Chemical Reactions
Stoichiometry involves the calculation of reactants and products in chemical reactions based on the conservation of mass. Understanding stoichiometry helps clarify how changes in the composition of substances occur during oxidation and reduction, emphasizing that the amount of oxygen does not dictate the oxidation state of a substance.
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01:16Stoichiometry Concept
Pratica correlata
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True or false:
(a) Reduction occurs if the oxidation number of an element
increases
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Determine the oxidation number of sulfur in each of the following substances: (a) barium sulfate, BaSO4 (b) sulfurous acid, H2SO3 (c) strontium sulfide, SrS
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Because the oxide ion is basic, metal oxides react readily with acids. (a) Write the net ionic equation for the following reaction: FeO(s) + 2 HClO4(aq) → Fe(ClO4)2(aq) + H2O(l) (b) Based on the equation in part (a), write the net ionic equation for the reaction that occurs between NiO(s) and an aqueous solution of nitric acid.
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