MSJChem - Tutorial videos for IB Chemistry
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  • SL Syllabus (last exams 2024)
    • Topic 1 Stoichiometric relationships
    • Topic 2 Atomic structure
    • Topic 3 Periodicity
    • Topic 4 Bonding
    • Topic 5 Energetics
    • Topic 6 Kinetics
    • Topic 7 Equilibrium
    • Topic 8 Acids and bases
    • Topic 9 Oxidation and reduction
    • Topic 10 Organic chemistry
    • Topic 11 Measurement and data processing
  • HL syllabus (last exams 2024)
    • Topic 12 Atomic structure HL
    • Topic 13 Periodicity HL
    • Topic 14 Bonding HL
    • Topic 15 Energetics HL
    • Topic 16 Kinetics HL
    • Topic 17 Equilibrium HL
    • Topic 18 Acids and bases HL
    • Topic 19 Redox HL
    • Topic 20 Organic chemistry HL
    • Topic 21 Measurement and data processing
  • Options (last exams 2024)
    • SL Option A
    • HL Option A
    • SL Option B
    • HL Option B
    • SL Option C
    • HL Option C
    • SL Option D
    • HL Option D
  • Exam review (last exams 2024)
  • New syllabus (first exams 2025)
    • Structure 1.1 Models of the particulate nature of matter
    • Structure 1.2 The nuclear atom
    • Structure 1.3 Electron configurations >
      • Structure 1.3 Electron configurations HL
    • Structure 1.4 Counting particles by mass: The mole
    • Structure 1.5 Ideal gases
    • Structure 2.1 The ionic model
    • Structure 2.2 The covalent model >
      • Structure 2.2 The covalent model (HL)
    • Structure 2.3 The metallic model
    • Structure 2.4 From models to materials
    • Structure 3.1 The periodic table : Classification of elements >
      • Structure 3.1 The periodic table: Classification of elements (HL)
    • Structure 3.2 Functional groups: Classification of organic compounds >
      • Structure 3.2 Functional groups: Classification of organic compounds (HL)
    • Reactivity 1.1 Measuring enthalpy changes
    • Reactivity 1.2 Energy cycles in reactions >
      • Reactivity 1.2 Energy cycles in reactions (HL)
    • Reactivity 1.3 Energy from fuels
    • Reactivity 1.4 Entropy and spontaneity (HL)
    • Reactivity 2.1 How much? The amount of chemical change
    • Reactivity 2.2 How fast? The rate of chemical change >
      • Reactivity 2.2 How fast? The rate of chemical change (HL)
    • Reactivity 2.3 How far? The extent of chemical change >
      • Reactivity 2.3 How far? The extent of chemical change (HL)
    • Reactivity 3.1 Proton transfer reactions >
      • Reactivity 3.1 Proton transfer reactions (HL)
    • Reactivity 3.2 Electron transfer reactions >
      • Reactivity 3.2 Electron transfer reactions (HL)
    • Reactivity 3.3 Electron sharing reactions
    • Reactivity 3.4 Electron-pair sharing reactions >
      • Reactivity 3.4 Electron-pair sharing reactions (HL)
Picture

Topic 19 Oxidation and reduction HL

19.1 Standard electrode potentials
Picture
Understandings:
The standard hydrogen electrode (SHE) consists of an inert platinum electrode in contact with 1 mol dm-3 hydrogen ion and hydrogen gas at 100 kPa and 298 K.  The Eº of the SHE is 0 V.
The standard electrode potential (Eº) is the potential (voltage) of the reduction half-equation under standard conditions measured relative to the SHE. 
​


19.1 Calculating cell potential
Picture
Applications and skills:
Calculation of cell potentials using standard electrode potentials.
​Applications and skills 
Prediction of whether a reaction is spontaneous or not using electrode potential  values.

19.1 Determining spontaneity of a reaction 
Applications and skills 
Prediction of whether a reaction is spontaneous or not using electrode potential  values.

19.1 Cell potential and Gibbs free energy  
Picture
Understandings:
When Eº is positive, ΔGº is negative indicative of a spontaneous process. When Eº is negative, ΔGº is positive indicative of a non-spontaneous process. When Eº is 0, then ΔGº is 0.


19.1 Electroplating
Picture
Understandings:
Electroplating involves the electrolytic coating of an object with a metallic thin layer.
Current, duration of electrolysis and charge on the ion affect the amount of product formed at the electrodes during electrolysis
Applications and skills:
Explanation of the process of electroplating.


19.1 Electrolysis of aqueous solutions 
Picture
Understandings:
When aqueous solutions are electrolysed, water can be oxidized to oxygen at the anode and reduced to hydrogen at the cathode.
Applications and skills:
Explanation of the products formed during the electrolysis of aqueous solutions.
Guidance:
Electrolytic processes to be covered in theory should include the electrolysis of aqueous solutions (eg sodium chloride, copper(II) sulfate etc) and water using both inert platinum or graphite electrodes and copper electrodes. Explanations should refer to Eº values, nature of the electrode and concentration of the electrolyte.

19.1 Factors that affect the amount of product formed in electrolysis 
Picture
Understandings:
Current, duration of electrolysis and charge on the ion affect the amount of product formed at the electrodes during electrolysis.
Applications and skills:
Determination of the relative amounts of products formed during electrolytic processes.


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  • Home
    • About
    • Blog
    • Online tutoring
    • Privacy policy
  • Member's Area
  • SL Syllabus (last exams 2024)
    • Topic 1 Stoichiometric relationships
    • Topic 2 Atomic structure
    • Topic 3 Periodicity
    • Topic 4 Bonding
    • Topic 5 Energetics
    • Topic 6 Kinetics
    • Topic 7 Equilibrium
    • Topic 8 Acids and bases
    • Topic 9 Oxidation and reduction
    • Topic 10 Organic chemistry
    • Topic 11 Measurement and data processing
  • HL syllabus (last exams 2024)
    • Topic 12 Atomic structure HL
    • Topic 13 Periodicity HL
    • Topic 14 Bonding HL
    • Topic 15 Energetics HL
    • Topic 16 Kinetics HL
    • Topic 17 Equilibrium HL
    • Topic 18 Acids and bases HL
    • Topic 19 Redox HL
    • Topic 20 Organic chemistry HL
    • Topic 21 Measurement and data processing
  • Options (last exams 2024)
    • SL Option A
    • HL Option A
    • SL Option B
    • HL Option B
    • SL Option C
    • HL Option C
    • SL Option D
    • HL Option D
  • Exam review (last exams 2024)
  • New syllabus (first exams 2025)
    • Structure 1.1 Models of the particulate nature of matter
    • Structure 1.2 The nuclear atom
    • Structure 1.3 Electron configurations >
      • Structure 1.3 Electron configurations HL
    • Structure 1.4 Counting particles by mass: The mole
    • Structure 1.5 Ideal gases
    • Structure 2.1 The ionic model
    • Structure 2.2 The covalent model >
      • Structure 2.2 The covalent model (HL)
    • Structure 2.3 The metallic model
    • Structure 2.4 From models to materials
    • Structure 3.1 The periodic table : Classification of elements >
      • Structure 3.1 The periodic table: Classification of elements (HL)
    • Structure 3.2 Functional groups: Classification of organic compounds >
      • Structure 3.2 Functional groups: Classification of organic compounds (HL)
    • Reactivity 1.1 Measuring enthalpy changes
    • Reactivity 1.2 Energy cycles in reactions >
      • Reactivity 1.2 Energy cycles in reactions (HL)
    • Reactivity 1.3 Energy from fuels
    • Reactivity 1.4 Entropy and spontaneity (HL)
    • Reactivity 2.1 How much? The amount of chemical change
    • Reactivity 2.2 How fast? The rate of chemical change >
      • Reactivity 2.2 How fast? The rate of chemical change (HL)
    • Reactivity 2.3 How far? The extent of chemical change >
      • Reactivity 2.3 How far? The extent of chemical change (HL)
    • Reactivity 3.1 Proton transfer reactions >
      • Reactivity 3.1 Proton transfer reactions (HL)
    • Reactivity 3.2 Electron transfer reactions >
      • Reactivity 3.2 Electron transfer reactions (HL)
    • Reactivity 3.3 Electron sharing reactions
    • Reactivity 3.4 Electron-pair sharing reactions >
      • Reactivity 3.4 Electron-pair sharing reactions (HL)