Suggest why manganate(VII), rather than dichromate(VI) is used to titrate with Fe(II) in volumetric analysis.
The Attempt at a Solution
i have figured out 2 possible answers but both may not be correct....
1. the colour change is sharper with manganate (purple to mostly colourless) while for dichromate it is orange to green... i'm not quite sure about it though...
2. The emf of the reaction with manganate(+0.75V) is higher than that for dichromate(+0.56V). But that shouldn't mean that the rate of reaction is faster, right?
i would have preferred dichromate because then i could use HCl as acid?! which i guess is more available than H2SO4.... i dunno :-S