CHLORIDE TEST METHOD for VINEGAR
Ionic equations OF silver

Ag+(aq) + Cl-(s) --> AgCl(s)
The amount of silver nitrate relates directly to the chloride ion concentration as it is a 1:1 ration reaction.
NOTE :: Silver nitrate & (HNO3) is added to vinegar to test if chloride (Cl-) is present.

WATER TEST METHOD :
Acetic Acid, Glacial, TS —Determine the water content of a specimen of glacial acetic acid by the Titrimetric Method . If the acid contains more than 0.05% of water, add a few mL of acetic anhydride, mix, allow to stand overnight, and again determine the water content. If the acid contains less than 0.02% of water, add sufficient water to make the final concentration between 0.02% and 0.05%, mix, allow to stand overnight, and again determine the water content. Repeat the adjustment with acetic anhydride or water, as necessary, until the resulting solution shows a water content between 0.02% and 0.05%.