- Joined
- Aug 14, 2002
- Messages
- 114
- Reaction score
- 0
Hi-
If any of you have had the general chemistry lab where you synthesized acetylsalicylic acid from salicylic acid and had to colormetrically determine %yield and what not, do you know/remember how it's possible for the yield to be over 100%?
Here's the lab instructions from another school that does this lab, just in case viewing this refreshes your memory:
http://courses.chem.psu.edu/chem14/FormsF03/aspirinlab2_F03.pdf
I looked online at some sites and the only explanations I could find/think of are:
1) solid wasn't completely dry (found this online...not sure why this would be the answer; it would seem that having more water would give a lower percent yield)
2) part of the synthesized acetylsalicylic acid was actually salicylic acid (which has a lower molar mass).
Eh...no s
If any of you have had the general chemistry lab where you synthesized acetylsalicylic acid from salicylic acid and had to colormetrically determine %yield and what not, do you know/remember how it's possible for the yield to be over 100%?
Here's the lab instructions from another school that does this lab, just in case viewing this refreshes your memory:
http://courses.chem.psu.edu/chem14/FormsF03/aspirinlab2_F03.pdf
I looked online at some sites and the only explanations I could find/think of are:
1) solid wasn't completely dry (found this online...not sure why this would be the answer; it would seem that having more water would give a lower percent yield)
2) part of the synthesized acetylsalicylic acid was actually salicylic acid (which has a lower molar mass).
Eh...no s