ok so i am carrying out a reaction that produces an immense amount of Hydrogen ions and that needs to be done at a pH of 6.8. I have two acids for preparing buffers. the first acid has a pka of 6.3 and the second acid has a pka of 7.3. which acid would make a better buffer? or would water just work fine as a buffer?
2007-01-16 04:14:57 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
pH you require is 6.8 which is slightly acidic.
Thus you need an acidic buffer.
For that you need a very weak base or acid.
Lower pka means stronger acid.
So for that you need one with higher pka .
Use one with pKa of 7.3
You also need a salt of strong acid to complete the buffer
Water would not work as buffer.
2007-01-16 04:28:18 · answer #1 · answered by Som™ 6 · 0⤊ 0⤋
you definitely need the higher pka value tht means 7.3 acid.but isnt 7.3 a base???
2007-01-16 12:49:20 · answer #2 · answered by perplexed 2 · 0⤊ 0⤋