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.
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.
1 answer