This question is based on the following reaction.
MnO41-(aq) + 5Fe2+(aq) + 8H1+(aq) -> 5Fe3+(aq) + Mn2+(aq) + 4H2O(l)
a) Is this reaction an oxidation-reduction reaction? Justify your response by identifying the oxidation states for manganese (Mn).
b) An sample of unknown concentration of potassium permanganate (KMnO4) is titrated with 25.0 mL of 1.25 M iron (II) nitrate (Fe(NO3)2). If the volume of potassium permanganate that was titrated is 12.7 mL, what is its concentration?
c) In a separate reaction, sodium hydroxide (NaOH) it used to standardize the iron (II) nitrate.
2NaOH(aq) + Fe(NO3)2(aq) -> Fe(OH)2(s) + 2NaNO3(aq)
If 40.0 mL of 0.95 M NaOH reacts with 31.0 mL of 0.65 M Fe(NO3)2, then what mass of the precipitate forms?
d) What are three major ions that remain in the filtrate?