Unit 7: Oxidation-Reduction

• How do batteries work?
• What makes a battery rechargeable?
• What makes rechargeable batteries "less rechargeable" after awhile?
• What is the difference between all the kinds of batteries?

1. Energy is transferred and a chemical change results when electrons move from one atom to another.
2. Controlling the movement of electrons allows one to do useful work (e.g. electricity).
3. Chemical potential energy can take a variety of forms.

IB Objectives: SL      HL

• Electrochemistry
  • Identify oxidation/reduction reaction using change in oxidation state
  • Write half equations for oxidation and reduction
  • Identify the species oxidized or reduced in a redox reaction
  • Identify the oxidizing agent and reducing agent
  • Balance redox reactions using
    • a. Oxidation state
    • b. Half reactions
  • Write complete ionic equations, net ionic equations, and identify spectator ions
  • Write redox reactions using cell notation
  • Define standard electrode potential and describe how they are measured
  • Deduce a reactivity series based upon the chemical behavior of a group of oxidizing and reducing agents
  • Deduce the feasibility of a redox reaction from a given reactivity series
  • Describe how a simple battery (voltaic cell) provides electricity
  • Draw a diagram showing the essential components of an electrolytic cell
    • a. Source of electrical current, conductors, positive and negative electrodes and electrolyte
  • Describe how current is conducted in an electrolytic cell
  • Define electrolysis and contrast with spontaneous redox reaction for production of electricity in a voltaic cell.
  • Deduce the products for the electrolysis of a molten salt
    • a. Including equations for each electrode
    • b. Reduction at cathode, oxidation at anode
  • List applications of oxidation/reduction reactions
    • a. Specifically electroplating of copper
• Math
  • Calculate cell potentials and determine the spontaneity of redox reactions

• Redox Intro/Overview
• More on Redox Reactions
• Balancing Redox Reactions
• Redox Notes Practice
• Electrochemical vs. Electrolytic Cells
• Standard Reduction Potentials

• Electrochemical Cell tutorial
• Gel Cells
• Factors that affect voltage in electrochemical cell
• Electroplate Your Car Keys

• Activity Series Online Lab
• Build a simple wet cell
• Electroplating
• Determine Avogadro's # (Vernier)
• Lead-Acid Battery (Vernier)
• Micro-voltaic Cell (Vernier)

Quizzes
• Redox Quiz
• Determining Oxidation State Quiz (there is no "enter" button on the screen, just press enter on the keyboard to check answer and get next question)
• Determining oxidation # quiz
• Which is oxidized and which is reduced? Quiz
• IB Only Balancing Redox

Quizzes
• Electrochem Quizzes