[georgeb301]

Given 2.00m aqueous solution of NH3, AlCl3, MgCl2 and KCl, put in order of vapor pressure lowest to highest. All solutions are at the same temperature.
Lowest
Next
Next
Highest

[DrBob1]

George: I think you will find the answer to this question in the COLLIGATIVE PROPERTIES chapter of your textbook. Ask back if you need more help; the answer should be pretty apparent once you have read the book.