Answer :
The sample that records the widest range in its boiling point is the more contaminated sample.
Boiling point
The boiling point of a solution is the point at which the atmospheric pressure is equal to the pressure of the boiling system. We must note that a pure substance has a sharp boiling point while an impure substance will boil over a temperature range.
To design an experiment to test the more contaminated sample, a thermometer is inserted into each sample and it is boiled in a closed container. The range of temperatures within which boiling occurs is recorded.
The sample that records the widest range in its boiling point is the more contaminated sample.
Learn more about boiling point: https://brainly.com/question/2153588