What do you observe when acetic acid is added to neutral ferric chloride solution

Dear student,

We used this test in the detection of acetic acid . First, acetic acid is dissolved in its own salts in aqueous medium. It is dissolved in ammonium hydroxide formed solution of pH-buffered above 7. The reaction as CH3COOH(aq) + NH4OH(aq) CH3COONH4(aq) + H2O(aq)
Now, put that test tube in the warm bath where it loses ammonia vapours , now add the neutral ferric chloride then reaction as follows
FeCl3(aq) + 3 CH3COONH4 (aq) (CH3COO)3Fe (aq) + 3NH4Cl(aq)
The iron(III) acetate is formed and which is responsible for the colouration . 
So, we can say that when acetic acid is dissolved in neutral ferric chloride solution it will forms iron(III) acetate and which is responsible for the colouration .

Regards
 

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