Ch.20 - Electrochemistry

Brown - Chemistry: The Central Science 15th Edition

Brown15th EditionChemistry: The Central ScienceISBN: 9780137542970당신이 사용하는 게 아니라요?교과서 변경

Brown 15th Edition

Ch.20 - Electrochemistry

문제 15c

20장, 문제 15c

Indicate whether each of the following statements is true or false: (c) If there are no changes in the oxidation state of the reactants or products of a particular reaction, that reaction is not a redox reaction.

검증된 단계별 안내

Understand the definition of a redox reaction: A redox (reduction-oxidation) reaction involves the transfer of electrons between two species, resulting in changes in their oxidation states.

Identify the key characteristic of a redox reaction: The oxidation state of at least one element must change during the reaction.

Analyze the given statement: It claims that if there are no changes in oxidation states, the reaction is not a redox reaction.

Evaluate the statement based on the definition: Since a redox reaction requires a change in oxidation states, if there are no changes, it cannot be a redox reaction.

Conclude the truth value of the statement: The statement is true because the absence of changes in oxidation states means the reaction is not a redox reaction.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.

영상 길이:

53s

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Oxidation and Reduction

Oxidation and reduction (redox) reactions involve the transfer of electrons between substances. Oxidation refers to the loss of electrons, resulting in an increase in oxidation state, while reduction refers to the gain of electrons, leading to a decrease in oxidation state. Understanding these processes is crucial for identifying redox reactions.

Oxidation States

Oxidation states (or numbers) are assigned to atoms in a compound to indicate their degree of oxidation. These states help track electron transfer during chemical reactions. A change in oxidation state signifies that a redox reaction has occurred, while no change indicates that the reaction is not a redox process.

Redox Reaction Criteria

For a reaction to be classified as a redox reaction, there must be a change in oxidation states of the reactants and products. If all oxidation states remain constant throughout the reaction, it is not a redox reaction. This criterion is essential for distinguishing redox reactions from other types of chemical reactions.

관련 실천

교과서 질문

Indicate whether each of the following statements is true or false: (a) If something is oxidized, it is formally losing electrons.

578

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교과서 질문

Indicate whether each of the following statements is true or false: (c) An oxidizing agent is needed to convert CO into CO₂.

650

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교과서 질문

For each of the following balanced oxidation–reduction reactions, (i) identify the oxidation numbers for all the elements in the reactants and products and (ii) state the total number of electrons transferred in each reaction. (a) I₂O₅(s) + 5 CO(g) → I₂(s) + 5 CO₂(g) (b) 2 Hg²⁺(aq) + N₂H₄(aq) → 2 Hg(l) + N₂(g) + 4 H⁺(aq) (c) 3 H₂S(aq) + 2 H⁺(aq) + 2 NO₃^-(aq) → 3 S(s) + 2 NO(g) + 4 H₂O(l)

554

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교과서 질문

(b) On which side of an oxidation half-reaction do the electrons appear?

1362

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교과서 질문

For each of the following balanced oxidation–reduction reactions, (i) identify the oxidation numbers for all the elements in the reactants and products and (ii) state the total number of electrons transferred in each reaction. (a) 2 MnO₄^-(aq) + 3 S^2-(aq + 4 H₂O(l) → 3 S(s) + 2 MnO₂(s) + 8 OH^-(aq) (b) 4 H₂O₂(aq) + Cl₂O₇(g) + 2 OH^-(aq) → 2 ClO₂^-(aq) + 5 H₂O(l) + 4 O₂(g) (c) Ba²⁺(aq) + 2 OH^-(aq) + H₂O₂(aq) + 2 ClO₂(aq) → Ba(ClO₂)₂(s) + 2 H₂O(l) + O₂(g)

718

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