16.1 - Redox Reactions Flashcards

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a redox reaction?

A reaction that involves only oxidation

A reaction that absorbs energy

A reaction in which electrons are transferred from the reducing agent to the oxidizing agent (correct)

A reaction that does not involve electrons

What happens in redox reactions?

Oxidation and reduction occur simultaneously.

Define oxidation.

Process by which a chemical species loses electrons.

What are oxidation reactions?

Reactions in which oxygen is a reactant. Signup and view all the answers

Iron is found in ores containing which minerals?

Hematite (Fe2O3) Signup and view all the answers

What does 'reduced' mean in a redox reaction?

Gain of electrons. Signup and view all the answers

What does 'oxidised' mean in a redox reaction?

Loss of electrons. Signup and view all the answers

Define reduction.

Process by which a chemical species gains electrons. Signup and view all the answers

What is a half equation?

Balanced chemical equation showing loss or gain of electrons by a species during oxidation or reduction. Signup and view all the answers

What does OIL RIG stand for?

Oxidation Is Loss, Reduction Is Gain. Signup and view all the answers

There is an overall loss of electrons in redox reactions.

False Signup and view all the answers

Provide an example of a redox equation that doesn’t involve a reaction with oxygen.

2K (s) + Cl2 (g) ==> 2KCl (s) Signup and view all the answers

What is an oxidant or oxidizing agent?

Reactant that causes another reactant to lose electrons during a redox reaction. Signup and view all the answers

What is a reductant or reducing agent?

Reactant that causes another reactant to gain electrons during a redox reaction. Signup and view all the answers

Metals tend to be reducing agents.

True Signup and view all the answers

Match the characteristics of reducing and oxidizing agents:

Reducing Agent = Loses electrons, reduces oxidizing agent, undergoes oxidation Oxidizing Agent = Accepts electrons, oxidizes reducing agent, undergoes reduction Signup and view all the answers

The overall equation of a redox reaction shows the transfer of electrons.

False Signup and view all the answers

What may need to be done to one or both of the half equations?

Multiplied by a factor to ensure electrons balance and are cancelled out. Signup and view all the answers

What is a conjugate redox pair?

Oxidizing agent and its corresponding reduced agent. Signup and view all the answers

Study Notes

Redox Reactions Overview

Redox reaction involves electron transfer from the reducing agent to the oxidizing agent.
Oxidation and reduction are simultaneous processes occurring in redox reactions.

Key Definitions

Oxidation: The process of losing electrons by a chemical species, such as metal atoms or non-metal ions.
Reduction: The process of gaining electrons by a chemical species.

Reaction Characteristics

Oxidation reactions often involve oxygen as a reactant, although not all redox reactions require oxygen.
The half equation represents the loss or gain of electrons during redox processes, ensuring clarity in electron transfer.

Mineral Sources and Examples

Iron is commonly found in ores such as haematite (Fe2O3) and magnetite (Fe3O4).
Example of a redox equation without oxygen:
2K (s) + Cl2 (g) ==> 2KCl (s)
- Oxidation half equation: K (s) ==> K+ (s) + e-
- Reduction half equation: Cl2 (g) + 2e- ==> 2Cl- (s)

Oxidising and Reducing Agents

Oxidising Agent: A reactant that causes another to lose electrons and is itself reduced. Example: In the reaction of magnesium with oxygen, oxygen acts as the oxidising agent.
Reducing Agent: A reactant that causes another to gain electrons and is itself oxidised. Example: In the same reaction, magnesium serves as the reducing agent.

Properties of Agents

Reducing Agents: Typically metals that lose electrons, reduce oxidising agents, and undergo oxidation.
Oxidising Agents: Typically non-metals that accept electrons, oxidise reducing agents, and undergo reduction.

Additional Concepts

There is no overall loss of electrons; instead, they are transferred between atoms, reinforcing simultaneous oxidation and reduction.
The overall equation of a redox reaction may not explicitly show the transferred electrons.
Half equations may require multiplication to balance electrons, ensuring they cancel out in the overall equation.

Conjugate Redox Pairs

A conjugate redox pair consists of an oxidising agent and its corresponding reduced agent, often denoted in the format oxidant/reductant. Example: Cu²⁺/Cu.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your knowledge of redox reactions with these flashcards. Learn key terms and definitions, including oxidation, reduction, and the fundamental concept of electron transfer. This set is perfect for anyone studying chemistry and wanting to master the basics of redox processes.