Titration- pre lab. really don't understand

[briteliner]

Homework Statement

suppose a small amount lead (II) chloride got into your Ba(OH)2 sample before titration, contaminating it. how do you think the contamination would affect your calculated concentration for the sample? what about a small amount of FeCl3?

Homework Equations

The Attempt at a Solution

would it just make it less soluble and therefore make the calculated concentration too high? why?

 

[Borek]

Think what reactions will occur after contaminant is added. How do they change the original composition of the solution? How these changes in the composition will be reflected in the final result of your titration?

Note: you have not told what kind of titration you are going to do, so whole thing doesn't make much sense.