Chapter 10, Problem 61E

Which of the following will have the lowest total vapor pressure at 25°C?

a. pure water (vapor pressure = 23.8 torr at 25°C)

b. a solution of glucose in water with ${\chi }_{{\text{C}}_{\text{6}}{\text{H}}_{\text{12}}{\text{O}}_{\text{6}}}=0.01$

c. a solution of sodium chloride in water with χ_NaCl = 0.01

d. a solution of methanol in water with ${\chi }_{{\text{CH}}_{\text{3}}\text{OH}}=0.2$ (Consider the vapor pressure of both methanol [143 torr at 25°C] and water.)