Aspirin that has been stored for a long time may give a vinegar-like odor and give a purple color with FeCl3. What reaction would cause this to happen?

(CH3CO2)C6H4CO2H +FeCl3

hydrolsis reaction

Explanation:

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)