permangometry titration w/ oxalic acid

labs

what type of titration is this?

redox titration

aim of this titration?

to find the concentration of the substance that KMnO4 oxidises which is the reducing agent e.g. oxalic acid (COOH)2

components added to this titration

• KMnO4 0.1 N

• H2SO4 20% w/v`% 

• oxalic acid 10ml (COOH)2 

colours observed in this titration? 

beginning; colourless → KMnO4 reduced upon reacting w/ oxalic acid (MnO4 - → Mn2+) 

endpoint; oxalic acid used up, KMnO4 is no longer reduced → light pink colour observed 

overtitration; purple → excess KMnO4 in solution 

come back to equation later

KMnO4 (an oxidising agent) is reduced from MnO4 → Mn2+, the oxidation number is reduced from which figure to which figure?

MnO4 - (+7) → Mn2+ (+2) it gains 5 electrons

what is used as a titrating substance and what indicator is used? 

KMnO4 and no indicator needed due to the colour KMnO4 (from purple to colourless)