What does a nonvolatile solute do the freezing point of a solution?
It lowers the freezing point.
How does increasing the concentration of a nonvolatile solute in water affect the freezing point and osmotic pressure?
Yes, nonvolatile solute lowers the vapor pressure and increases the boiling point. For instance, salt is an example of an nonvolatile solute in water. Ever wonder why salt is used in icy roadways in the winter? Because salt help inhibit the crystallization of water particles into ice by lowering the freezing point.