Chemistry HL
Chemistry HL
6
Chapters
243
Notes
Chapter 1 - Models Of The Particulate Nature Of Matter
Chapter 1 - Models Of The Particulate Nature Of Matter
Chapter 2 - Models Of Bonding & Structure
Chapter 2 - Models Of Bonding & Structure
Chapter 3 - Classification Of Matter
Chapter 3 - Classification Of Matter
Chapter 4 - What Drives Chemical Reactions?
Chapter 4 - What Drives Chemical Reactions?
Chapter 5 - How Much, How Fast & How Far?
Chapter 5 - How Much, How Fast & How Far?
Chapter 6 - What Are The Mechanisms Of Chemical Change?
Chapter 6 - What Are The Mechanisms Of Chemical Change?
IB Resources
Chapter 6 - What Are The Mechanisms Of Chemical Change?
Chemistry HL
Chemistry HL

Chapter 6 - What Are The Mechanisms Of Chemical Change?

Mastering Half-Equations: The Key to Understanding Redox Reactions

Word Count Emoji
472 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

The Basics 🍔

  • When you see sodium (Na) react with chlorine (Cl) to make salt (NaCl), they're actually sharing electrons. This electron sharing can be shown with two separate reactions, known as half-equations!
  • Equation: 2Na(s) + Cl2(g) → 2NaCl(s)
    • Oxidation Half-Equation: Na(s) → Na⁺ + e⁻
    • Reduction Half-Equation: Cl2(g) + 2e⁻ → 2Cl⁻

🌟 Think of half-equations like a pizza split into two halves – one with pepperoni (oxidation) and one with mushrooms (reduction). Each half is unique, but together, they make a whole pizza (the complete reaction)!

Steps to Write Redox Reactions 🛠

  • Spot the Hero & Villain: Find out who's being oxidized (losing electrons) and who's being reduced (gaining electrons).
  • Split 'em Up: Break the equation into two half-equations – one for oxidation and one for reduction.
  • Balance Act: Ensure the atoms in both half-equations are balanced.
  • Electron Tango: For oxidation, electrons are lost and written on the right. For reduction, electrons are gained and go on the left.
  • Match the Dance Steps: Make sure electrons lost = electrons gained. Adjust the equations to match!
  • Combine for the Grand Finale: Add both half-equations and cancel out the common bits (especially those dancing electrons).
  • Hydrate!: If it’s an acidic solution, add H2O for oxygen and H+ for hydrogen. For neutral/basic solutions, use OH⁻ for oxygen and H2O for hydrogen.
  • Charge Check: Make sure the sum of the charges on both sides equals zero.

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IB Resources
Chapter 6 - What Are The Mechanisms Of Chemical Change?
Chemistry HL
Chemistry HL

Chapter 6 - What Are The Mechanisms Of Chemical Change?

Mastering Half-Equations: The Key to Understanding Redox Reactions

Word Count Emoji
472 words
Reading Time Emoji
3 mins read
Updated at Emoji
Last edited on 5th Nov 2024

Table of content

The Basics 🍔

  • When you see sodium (Na) react with chlorine (Cl) to make salt (NaCl), they're actually sharing electrons. This electron sharing can be shown with two separate reactions, known as half-equations!
  • Equation: 2Na(s) + Cl2(g) → 2NaCl(s)
    • Oxidation Half-Equation: Na(s) → Na⁺ + e⁻
    • Reduction Half-Equation: Cl2(g) + 2e⁻ → 2Cl⁻

🌟 Think of half-equations like a pizza split into two halves – one with pepperoni (oxidation) and one with mushrooms (reduction). Each half is unique, but together, they make a whole pizza (the complete reaction)!

Steps to Write Redox Reactions 🛠

  • Spot the Hero & Villain: Find out who's being oxidized (losing electrons) and who's being reduced (gaining electrons).
  • Split 'em Up: Break the equation into two half-equations – one for oxidation and one for reduction.
  • Balance Act: Ensure the atoms in both half-equations are balanced.
  • Electron Tango: For oxidation, electrons are lost and written on the right. For reduction, electrons are gained and go on the left.
  • Match the Dance Steps: Make sure electrons lost = electrons gained. Adjust the equations to match!
  • Combine for the Grand Finale: Add both half-equations and cancel out the common bits (especially those dancing electrons).
  • Hydrate!: If it’s an acidic solution, add H2O for oxygen and H+ for hydrogen. For neutral/basic solutions, use OH⁻ for oxygen and H2O for hydrogen.
  • Charge Check: Make sure the sum of the charges on both sides equals zero.

Unlock the Full Content! File Is Locked Emoji

Dive deeper and gain exclusive access to premium files of Chemistry HL. Subscribe now and get closer to that 45 🌟

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