November 25, 2024, 02:52:27 PM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: preparing a buffer  (Read 9594 times)

0 Members and 2 Guests are viewing this topic.

myelver10

  • Guest
preparing a buffer
« on: November 23, 2004, 02:29:07 AM »
how would u  pick a suitable acid/base pair  to prepare a buffer with a pH of 3.5    

In this case the pKa is 3.5  right   ??
Logged

Offline AWK

  • Retired Staff
  • Sr. Member
  • *
  • Posts: 7976
  • Mole Snacks: +555/-93
  • Gender: Male
Re:preparing a buffer
« Reply #1 on: November 23, 2004, 09:10:32 AM »
For weak acid with pKa = 3.5 your buffer solution should contain salt and weak acid with molar ratio 1:1. Of course you can use other acids, but with pKa within +-1 around pH of solution.
Formic acid with pKa 3.7 is probably the best choose.
Logged
AWK
Pages: [1]   Go Up
« previous next »
Sponsored Links