Titration Errors (1 Viewer)

[sunmoonlight]

If you use a wrong indicator (say like the end point is before the equivalence point), how would it affect the concentration of titrant and aliquot (like which one will be underestimated and which one will be overestimated?)

 

[wizzkids]

You need to consider all the possibilities.
Look at the figure below. In this example I have a pH indicator that transitions maybe 1 pH unit on the low side of the true equivalence point.
As you can see, the error that is introduced will depend on which direction you are titrating from. The volume of the titre could come out too small or too large. I leave it as an exercise for you to work out whether the analysis of the unknown solution will come out too high or too low.