I had to adjust my solution by adding more base.
2007-01-02 12:17:40 · 3 answers · asked by makatangtala 1 in Science & Mathematics ➔ Chemistry
TO obtain a buffer solution you want a Weak acid or Weak base because they resist thier change in pH and they therefore are closer to 7(neutral).
-One thing that could've happened when you didn't get the desired pH is that you had a too acidic solution.
-Another would be that you measured wrong with the amount of solution you wanted to dilute or QS.
-Or you simply diluted to less of the solution and made it too acidic on the experiment
2007-01-02 12:24:39 · answer #1 · answered by TheThing 2 · 0⤊ 0⤋
This can happen for many reasons. Were you using de-ionized water? Was the pH meter calibrated correctly before you did this? Was the pH meter calibrated at the right temperature? Did you wait a while (a few minutes) for the solutions to completely dissolve? Also, Sometimes pH meters (especially old ones) may take a while to fully stabilize.
2007-01-03 04:42:03 · answer #2 · answered by Bob 5 · 0⤊ 0⤋
Hmm.. may I ask what acid and base where you using to titrate? If you use a weak acid/base vs a strong base/acid, there's a chance that you can overtitrate. If you take a look at a titration curve. There is a very small window to titrate and adjust if your desired pH is very close to the equivalence point.
2007-01-02 12:31:33 · answer #3 · answered by yungr01 3 · 0⤊ 0⤋