How does the temperature range over which a solution remains liquid compare to the range over which the?

Question

How does the temperature range over which a solution remains liquid compare to the range over which the corresponding pure solvent remains liquid?

a) the solution's range is narrower
b) the solution's range is wider
c) the two ranges are equal
d) any of the above may be true depending on the solvent

Answer 1

The solutions range is wider. This is called colligative properties. When you add a solute to a solvent, the freezing point goes down and the boiling point goes up.