This module is concerned with reaction chemistry involved in the procedure for determining the iron(II) content of a sample by titration with potassium in acidic solution to give manganese(II) and iron(III) ions.
On completion of the module you should be able to
sulfate7H2O.jpg) iron(II) sulfate (Fe2+) |  potassium (MnO4–) |
nitrate9H2O.jpg) iron(III) nitrate (Fe3+) | sulfate4H2O.jpg) manganese(II) sulfate (Mn2+)) |
On completion of the module you should be able to
- balance the equation for the reaction of iron(II) ions with ions in acidic solution to give Mn2+
- choose an appropriate strong acid for use in acidifying the solution and to justify your choice based on redox properties of these acids
- predict the colour of the solution in the titration flask at various points in the titration and to explain why no additional indicator is required
- predict how the outcome of the reaction is changed if insufficient acid is present and to explain the consequence of this on the titre value