Raoult's Law and Vapor Pressure Lowering
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
Raoult's law states a solution's vapor pressure equals the pure solvent's vapor pressure times the solvent's mole fraction, so a nonvolatile solute lowers it.
Show
Dissolving glycerin, a nonvolatile solute, in ethanol lowers the solution's vapor pressure below that of pure ethanol.
Watch for
This form covers a nonvolatile solute — a volatile second component would add its own partial pressure instead.