II. Determination of Unknown Concentration
Add 1.2 mL of unknown Fe (II) solution into an Erlenmeyer flask along with 20.0 mL DI H2O, 1.0 mL 9 M H2SO4, 2 drops 0.1 M MnSO4, and 1 drop of 3 M phosphoric acid (H3PO4). Use a graduated pipet with 0.02 M KMnO4 to titrate solution.
1. Volume of Fe(II) solution used- 1.2 mL
2. Volume of KMnO4 solution used- 1.28 mL —– this is the amount of KMnO4 that was used to turn solution a pink color
*3. Balance the following chemical reaction
__MnO4– + __Fe+2 + __H+ —–> __Mn+2 + __Fe+3 + __H2O
*4. Calculate the molarity of the Fe(II) solution. _________ M