## Nitrates and Nitrites with FeSO4 + CH3COOH

1. The problem statement, all variables and given/known data
I know that NO3- can be separately identify using newly made FeSO4 + H2SO4 using the brown ring test.
The problem is can we identify NO2- using newly made FeSO4 + CH3COOH??? Replacing H2SO4 with CH3COOH???

2. Relevant equations
NO2-(aq) + FeSO4(aq) + CH3COOH(aq)$\Rightarrow$ [A Brown Circle]???
or is this equation invalid???

3. The attempt at a solution
Nothing being attempted!!! :(
 Admin NO2- or NO3-, you are inconsistent. If NO3- try to find out what is the reaction involved.
 Its NO2- is the problem. I've never learn such a reaction using Acetic acid to identify NO2- and a paper says you can't but I got it from a friend who says that using Acetic acid can identify NO2-.