posted by yuni on .
KMn04 with iron(II) ammonium sulphate hexahydrate-redox titration.
1-what is the purpose of adding H2SO4 to iron sample before the titration?
2-why is there no indicator used to determine the end point for this titration?
3-suggest another possible oxidising agent and reducing agent can be used to replace potassium permanganate & iron (II) ammonium sulphate haxahydrate in this exp.
H2SO4 is added to make sure the solution is acid. KMnO4 behaves differently in acid vs basic solutions.
No separate indicator is needed since KMnO4 serves as its own indicator.
#3 is confusing to me. I don't know what the question is asking.