Ib Chemistry Analysis of Iron Tablets

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DCP + CE: An Analysis of Iron Tablets

|Pipette Solution |Iron (II) solution | |25 cm3 | |Burette Solution |Potassium Manganate (VII) |0.01 moldm-3 | | | |Trial |1 |2 |3 | | |Burette Readings |Final |11.35 |10.90 |10.95 |10.95 | | | |Initial |0.00 |0.00 |0.00 |0.00 | | |Volume Used (Titre)/ cm3 |11.35 |10.90 |10.95 |10.95 | | |Mean Titre/ cm3 |10.95 | | | |Qualitative Data |Colour change- |Colour change- |Colour change- |Colour change- | | | |purple to pink |purple to pale |purple to pale |purple to pale pink| | | |(overshoot) |pink |pink | | |

Raw Data Table:
Titration of iron (II) solution with 0.01M potassium manganate (VII) solution

Chemical reaction during titration:
5Fe2+ ( 5Fe3+ + 5e-oxidation
+) MnO4- + 8H+ + 5e- ( Mn2+ + 4H2O reduction
5Fe2+ + MnO4- + 8H+ ( 5Fe3+ +Mn2+ + 4H2O

Mass of Iron used (weigh by difference)
Mass of container + iron tablets = 14.57g
Mass of container = 13.05g
Mass of iron used = 1.52g

No of moles of MnO4- in solution
n(MnO4-) = concentration * volume used (titre)
= 0.01moldm3 * 10.95 cm3/ 1000
= 1.095 * 10-4 mol

No of moles of...
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