You can review the learning in this tutorial by using the pH Curve Drawing applet below.
The applet draws the graph of pH against volume of titrant added for the titration of an acid by a base. Specifically:
Select an acid and select a base (note: default is strong acid/strong base) and then press the run button to draw the pH curve for the acid-base titration.
For an acid-base titration:
- for a strong acid/strong base the equivalence point is at pH 7.0.
- for a weak acid/strong base the equivalence point is below pH 7.0 and the pH rises faster before the equivalence point than in the strong acid/strong base titration.
- for a strong acid/weak base the equivalence point is above pH 7.0 and the pH rises slower after the equivalence point than in the strong acid/strong base titration.
- for a weak acid/weak base the shape of the graph is a combination of the effects and explanations relating to the weak acid in the weak acid/strong base titration and the weak base in the strong acid/weak base titration.