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1. Which acid and its conjugate base would be the best buffer at pH=4.7? 4‑(2‑hydroxyethyl)piperazine‑1‑ethanesulfonic acid...

1. Which acid and its conjugate base would be the best buffer at pH=4.7?

4‑(2‑hydroxyethyl)piperazine‑1‑ethanesulfonic acid (HEPES); ?a=3.2×10−8

4‑morpholineethanesulfonic acid (MES); ?a=7.9×10−7

2‑amino‑2‑hydroxymethyl‑propane‑1,3‑diol (Tris); ?a=6.3×10−9

acetic acid; ?a=1.8×10−5

formic acid; ?a=1.8×10−4

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