Acid/Base Titration

  • #1

Homework Statement


Supposed to rank a bunch of titrations in order of pH; Here is one of the many...
200.0 mL of 0.100 M (C2H5)2NH (Kb = 1.3 x 10-3) by 0.100 M HCl

Homework Equations


Henderson–Hasselbalch equation?

The Attempt at a Solution


I don't even know where to start, I'm trying to help a friend (obv. doing a great job).
If someone could help do this one I think I'll remember how to do these questions.
 

Answers and Replies

  • #2
I mean the pH at the equivalence point of the titration
 
  • #3
I mean the pH at the equivalence point of the titration

What it sounds like you are looking for are the various pH ranges that every buffer has. The equivalence point is when the moles of acid = moles of base (not necessarily pH=7); so various inorganic and organic buffers will have equivalence points in certain ranges that are suitable to various applications, i.e. reactions. You can use the H.H. equation and known pKa value to calculate pH for various buffers
 
  • #4
Borek
Mentor
28,886
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What it sounds like you are looking for are the various pH ranges that every buffer has.

There is no buffer at the equivalence point.

Well... technically you can argue that it exists. But Henderson-Hasselbalch equation will fail miserably.
 
  • #6
Sorry for the last reply, your replies were too late to help my friend. But I still want to know for my own benefit, so thanks.
 

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