pH = 3 would lactic acid or trichloroacetic acid be used?

Moderators: Chem_Mod, Chem_Admin

Chem_Mod
Posts: 17674
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 404 times

pH = 3 would lactic acid or trichloroacetic acid be used?

Postby Chem_Mod » Sun Aug 21, 2011 12:45 pm

Question: For a pH of 3, would lactic acid or trichloroacetic acid be used? It seems like lactic acid is a better answer because the pKa is 3.08 which is closer to 3 than 2.85.

Chem_Mod
Posts: 17674
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 404 times

Re: Ph=3would lactic acid or trichloroacetic acid be used?

Postby Chem_Mod » Sun Aug 21, 2011 12:48 pm

Answer: Lactic acid has a pKa of 3.86 while trichloroacetic acid has a pKa 2.85. Several weak acids have suitable buffers for a pH~3, not just trichloroacetic acid.


Return to “*Making Buffers & Calculating Buffer pH (Henderson-Hasselbalch Equation)”

Who is online

Users browsing this forum: No registered users and 1 guest