1. The problem statement, all variables and given/known data 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? 2. Relevant equations 3. The attempt at a solution would it just make it less soluble and therefore make the calculated concentration too high? why?