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Introduction to Redox Reactions Summary (Chemistry 30)
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  • Course
  • Chemistry
  • Institution
  • 12th Grade

These notes go over the fundamentals of redox reactions with a focus on electron transfers between different substances. They highlight how this electron transfer is crucial to understanding some reactions, such as single replacement reactions, which may be observed empirically. The notes include e...

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  • September 7, 2023
  • 3
  • 2023/2024
  • Summary

Subjects

  • redox
  • chemistry
  • chem 30
  • chemistry 30
  • redox reactions
  • spontaneity of reactions
  • reactivity ranking
  • electron transfer
  • metal ions
  • single replacement reactions

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  • Secondary school
  • 12th Grade
  • Chemistry
  • 1
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Introduction To Redox (Chem
30)

Single Replacement Reactions:

These reactions involve one element substituting another in a compound.

Serve as an introduction to oxidation and reduction concepts.

Half-Reactions:

Reactions can be divided into two half-reactions.

Each half-reaction represents changes in one reactant.

Simplify explanations and are crucial for understanding redox reactions.

Example Reaction:

Zinc (Zn) reacting with hydrochloric acid (HCl) forms zinc chloride (ZnCl2) and
hydrogen gas (H2):

Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)
Zinc Oxidation:

Zinc atoms in solid (Zn(s)) lose two electrons to become zinc ions in solution
(Zn²⁺(aq)):

Zn(s) → Zn²⁺(aq) + 2 e⁻

Hydrochloric Acid Reduction:

Hydrogen ions (H⁺(aq)) in the solution gain electrons and become hydrogen gas
(H2(g)):

2 H⁺(aq) + 2 e⁻ → H2(g)

Reduction and Oxidation:

Reduction involves gaining electrons.

Oxidation involves losing electrons.

Reduction neutralizes ions, while oxidation forms ions.

Redox Reactions:


Introduction To Redox (Chem 30) 1

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