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HSC Chemistry

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  1. Module 5: Equilibrium and Acid Reactions
    5.1 Static and Dynamic Equilibrium
    5 Topics
  2. 5.2 Factors that Affect Equilibrium
    2 Topics
  3. 5.3 Calculating the Equilibrium Constant
    2 Topics
  4. 5.4 Solution Equilibria
  5. Module 6: Acid/Base Reactions
    6.1 Properties of Acids and Bases
    7 Topics
  6. 6.2 Using Brønsted–Lowry Theory
    2 Topics
  7. 6.3 Quantitative Analysis
    1 Topic
  8. Module 7: Organic Chemistry
    7.1 Nomenclature
    2 Topics
  9. 7.2 Hydrocarbons
    2 Topics
  10. 7.3 Products of Reactions Involving Hydrocarbons
  11. 7.4 Alcohols
    1 Topic
  12. 7.5 Reactions of Organic Acids and Bases
  13. 7.6 Polymers
    2 Topics
  14. Module 8: Applying Chemical Ideas
    8.1 Analysis of Inorganic Substances
    3 Topics
  15. 8.2 Analysis of Organic Substances
  16. 8.3 Chemical Synthesis and Design
  17. Working Scientifically
    Working Scientifically Overview
    1 Topic

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Lesson 8, Topic 2
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Isomerism

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Isomer = same molecular formula, different structural/spatial arrangement.

Small molecules can have many isomers, for example:

  • Pentane: 17 atoms, 3 isomers
  • Decane: 32 atoms, 75 isomers

Structural Isomers

Same molecular formula, different structural formulae.

  • Different compounds
  • Different properties
  • Different names
  • Composed of the same atoms
  • Cannot be made identical through rotation around bonds
ChainPositionFunctional
Different arrangement of molecule’s carbon skeleton.Different position of a functional group within a molecule.Different arrangement of atoms –> different functional group.