1.) Manganate(VII) solution oxidize iron(II) ions to
iron(III) according to the following ionic equation:
5Fe^2+ + MnO4^- + 8H^+ ----> 5Fe^3+ +Mn^2+ 4H2O
2.5g of potassium manganate (VII) was dissolved in 50.0cm^3
of 0.1 M sulphuric acid . Distilled water was then added to the
mixture until the solution was made up to 250.0 cm^3 in a
volumetric flask. At the same time,4.5g of an iron(II) salt was
dissolved in distilled water and the solution was made up to
100.0cm^3.
25.0cm^3 of the acidified manganate (VII) solution required
33.4cm^3 of this iron(II) salt solution for complete reaction.
a.) Calculate the molarity of the acidified potassium
manganate (VII) solution.
b.)From the results,calculate the molarity of the iron(II) solution.
c.) Given the molar mass of the iron(II) salt is 152.3g mol^-1,
what is hte percentage purity of the salt?
Thank you so much!!