A clear colorless liquid in an open beaker was heated to boiling.The liquid began to boil at 110°C,and as vapors escaped,the temperature of boiling gradually increased to 115°C,at which point the heating was stopped.On the basis of this information,we can say that the material in the beaker was a
A)pure compound.
B)homogeneous solution.
C)pure substance.
D)pure element.
E)heterogeneous solution.

Question

Quizplus · Accepted Answer

The material in the beaker was a homogeneous solution because the boiling point increased as it was heated, indicating the presence of a non-volatile solute that elevates the boiling point of the solvent as it becomes more concentrated. Pure compounds, pure substances, and pure elements have fixed boiling points, and heterogeneous solutions would not display a uniform change in boiling point.

A Clear Colorless Liquid in an Open Beaker Was Heated