Physical Chemistr Multicomponent Phase Colligative Properties Vapor-pressure lowering AP/torr 0 y nonvolatile solute (12.1) △P=P nonvolatile solute (12.2) (No contribution to the vapor) e If the solution is very dilute, LAI 0 x(sucrose)0.1 Fig.12.1 △P=P-P ideally dilute solution, nonvolatile solute (12.3)55 Colligative Properties Vapor-pressure lowering * A A PA P P xA = =  * A A * A P = P − P = ( A x −1)P PA /torr x (sucrose) 0 -4 0 0.1 Fig. 12.1 nonvolatile solute (12.1) nonvolatile solute (12.2) (No contribution to the vapor) If the solution is very dilute,  A 1 * A A * A P = P − P = (x −1)P ideally dilute solution, nonvolatile solute (12.3) Physical Chemistry Multicomponent Phase