This is for the preparation of aspirin by using salicylic acid and acetic anhydride with phosphoric acid as a catalyst.
2007-07-25 10:05:02 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
Add dilute aqueous ferric chloride solution. If salicylic acid is there, the solution will turn purple. Be careful, however: Even the freshest prepared aspirin can test purple, because it hydrolyzes all the time.
2007-07-25 10:11:46 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋
You're looking to test for the presence of acid.
Does it change acid-base indicator color.
Does it make blue litmus turn red, does it make universal indicator turn red.
(More technical: is there the characteristic OH stretch for a carboxylic acid in the I.R. spectrum)
2007-07-25 10:13:15 · answer #2 · answered by hidethesky 2 · 0⤊ 0⤋
Look for the absence or presence of the phenolic H in the NMR
2007-07-25 14:36:54 · answer #3 · answered by Anonymous · 0⤊ 0⤋