Asked by Debbie

Which of the following has the highest buffer capacity?
A. 0.10M H2PO4-/0.10M HPO4 2-
B. 0.50M H2PO4-/0.10M HPO4 2-
C. 0.10M H2PO4-/0.50M HPO4 2-
D. 0.50M H2PO4-/0.50M HPOr 2-
E. They all have the same buffer capacity.

Double checking I believe C is the right answer.
Answered by DrBob222
No. This is not the same post as before. The other one was carbonate/bicarbonate. This is dihydrogen phosphate/monohydrogen phosphate.
C doesn't have the a ratio of 1.0 does it. Nope. Can't be right when there are two others listed that do have a ratio of 1.0. And you pick the one with the highest concn for the highest buffer capacity.
Answered by Dr.Rob333
It's D, they are in equal amounts and the greatest concentration.
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