diagram or data shows impuirties affect melting or boling point

Answer 1

When impurities are added to a substance, they disrupt the orderly arrangement of molecules and ions that would typically occur in a pure substance. This disruption causes the melting point and boiling point of the substance to change. Specifically, the presence of impurities typically lowers the melting point and raises the boiling point.

One way to show this graphically is to create a phase diagram of a pure substance (with a solid-liquid-gas line) and then compare it to the phase diagram of that substance with impurities present. The presence of impurities would cause a shift in the solid-liquid line to lower temperatures and in the liquid-gas line to higher temperatures.

Alternatively, a data table could be created that shows the melting points and boiling points of a substance with varying amounts of impurities present. As the amount of impurities increases, the melting point should decrease and the boiling point should increase. This data could then be graphed to show a clear trend of how impurities affect melting and boiling points.