If precipitation of BaSO4 is incomplete due to inadequate heating or insufficient time what will happen to the sulfate percent error determination? And why?

Answer 1

Just below, I responded to a similar question by Matt suggesting this is a poor question. The only correct answer I think is that the percent error will increase and surely that is too simple an answer. The error will increase, meaning it will be an error mor than perfect results, because if some of the BaSO4 is not recovered then not all of the sulfate was recovered and that results in an error. Surely that is obvious from the beginning.