What reagent would distinguish between Ag+ and Fe3+?

Question

aaronq · Answer

Throw in some $Cl^-$ ions (can be in form of NaCl), they'll form different colours of precipitates. AgCl is whitish, and $FeCl_3$ is reddish

anonymous · Answer

So out of the options:
	NaNO3
	NaI
	NaClO3
	NaOH 

NaClO3 is correct? how do I know that without you just telling me? is there a rule?

aaronq · Answer

Mind you that iron(III)chloride is very soluble, so you wont see a ppt right away.

somy · Answer

you can use NaOH

somy · Answer

with Fe3+ it'll give red-brown ppt and is insoluble in excess

anonymous · Answer

how do i figure this out though? is there any way I can know? solubility rules or something?

somy · Answer

do u do experiments in lab?

anonymous · Answer

we did some, but not about this...

aaronq · Answer

yeah, have a solubility table around. both of them precipitate with $OH^-$ into different colours.

anonymous · Answer

i thought it might be NaI because iodine is not soluble w/ Ag...is that wrong?