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CHEM1901 - Resources for Week 11


Topics and Learning Outcomes

  • Equilibrium
    •  explain chemical equilibrium as a reaction mixture whose composition is unchanging in time, and relate this to the kinetic picture of equal rates of formation and decomposition of reactants and products
    •  define the equilibrium constant, and write it down for an arbitrary gas phase reaction
    •  calculate the value of the equilibrium constant for a reverse reaction from its value for a forward reaction, and if the stoichiometry is changed
    •  calculate the equilibrium constant for a reaction obtained by combining two other reactions
    •  calculate equilibrium compositions from starting compositions and the equilibrium constant for a simple gas phase reaction
    •  calculate the equilibrium composition for a chemical reaction from its equilibrium constant and mass balance information
    •  use appropriate aproximations for simplifying such calculations
    •  define the reaction quotient and use it to predict the direction of change in a reaction as it approaches equilibrium, or if it is perturbed from equilibrium.
    •  use the enthalpy of reaction to predict how the equilibrium constant changes with temperature
    •  explain that catalysts change the pathway and rate of reaction but not the position of equilibrium
    •  explain that entropy depends on concentration, but enthalpy can be treated as independent of concentration
    •  explain the reasons for the conditions used in the Haber Process, and apply the same reasoning to the optimization of other chemical processes, such as smelting
  • Equilibrium and Thermochemistry in Industrial Processes
    •  identify and explain the major steps in mineral extraction and purification into its metal
    •  Identify the major forms of mineral sources of metals and other elements
    •  read and interpret an Ellingham diagram, and use it to predict the temperature at which metal formation will be spontaneous
    •  relate activity and electronegativity to oxide stability
    •  define the terms gangue, slag, roasting and smelting
    •  identify (but not list) the top ten chemicals by production mass, their origins and uses
    •  explain how sulfuric acid is produced, including the thermodynamic and kinetic considerations of the synthetic steps
    •  describe the key elements of the nitrogen biocycle
    •  describe the preparation of phosphoric acid, and the relevance of ammonia and sulfuric acid in phosphate derivatives
  • Electrochemistry
    •  Identify oxidation and reduction half-reactions, and combine them into a balanced redox reaction
    •  explain how a Galvanic cell is constructed to draw a current from a redox reaction
    •  use the activity series to decide which element or compound is the stronger oxidant
    •  calculate the (standard) cell potential and determine the spontaneous direction of a redox reaction under standard conditions
    •  calculate the cell potential for standard and non-standard conditions from the half-cell reactions, and determine the spontaneous direction of a redox reaction
    •  calculate equilibrium constants from standard cell potentials and vice versa
    •  combine reaction quotient and cell potential information to solve for unknown concentrations both at equilibrium and away from equilibrium
    •  identify the key design features of an electrochemical sensor, and calculate an unknown concentration for appropriate electrochemical data

Textbook and eBook References

  • Chemical Equilibrium - Chapter 9
  • Equilibrium and Thermochemistry in Industrial Processes - Chapter 9
  • Electrochemistry - Sections 12.1 - 12.5
  • Batteries and Corrosion - Section 12.7
the eBook references are free and are taken from high quality sources.

Lecture Notes, Tutorial Worksheets & Answers and Suggested Exam Questions

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ChemCAL and iChem Resources

Contributed Links and Resources

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Chemical Equilibrium -  
  Using ICE tables  
 
Description: Tutorial on using ICE tables to solve chemical equilibrium problems
Tags: equilibrium | ICE tables  |  Contributed by Adam Bridgeman
 
  Chemical equilibrium tutorial  
 
Tags: equilibrium | Le Chatelier's principle  |  Contributed by Adam Bridgeman
 
  Le Chatelier's Principle  
 
Tags: eqilibrium | Le Chatelier's principle | reaction quotient  |  Contributed by Adam Bridgeman
 
Equilibrium and Thermochemistry in Industrial Processes -  
Electrochemistry -  
  Galvani cells  
 
Tags: Galvanic cells | voltaic cells  |  Contributed by Adam Bridgeman
 
  Cell potentials  
 
Tags: Galvanic cells | voltaic cells  |  Contributed by Adam Bridgeman
 
  Balancing redox equations  
 
Tags: redox equations  |  Contributed by Adam Bridgeman
 
  Electrochemical Cells (short video tutorial)  
 
Tags: Galvanic | voltaic | electrolytic  |  Contributed by Adam Bridgeman
 
  Redox Reactions and Cell Potentials  
 
Tags: redox | cell potentials | half cells  |  Contributed by Adam Bridgeman
 
Batteries and Corrosion -  


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