Barbara's answer is correct. You have to redo any that have failed.

I would also encourage you to redo any potions that did not make sense at the time you made them. The potion recipes I am talking about may have taken only 1 or 2 ingredients to complete. I assumed I knew what the completed potion was and counted it as complete when in reality I did not know for sure what was actually in the pot.

The Alchemy R Us Award can be completed. It just takes accurate record keeping and perseverance. You probably have documented your "recipes". If you have not kept records, it would be very difficult to know which recipe hadn't been completed and needs to be "redone". You might have to start over and systematically redo each recipe, which I did in one of my games and was thrilled when the award actually showed up.

Hang in there, it'll be well worth it! EM