Rank the following aqueous solutions from lowest to highest boiling point: 0.5 m NaCl, 1 m KCl, 0.5 m BaCl2, and 1 m Ba(NO3)2. All salt are dissolved in water.
a) 1 m Ba(NO3)2 < 0.5 m NaCl < 0.5 m BaCl2 < 1 m KCl
b) 1 m KCl < 1 m Ba(NO3)2 < 0.5 m NaCl < 0.5 m BaCl2
c) 0.5 m BaCl2 < 1 m KCl < 1 m Ba(NO3)2 < 0.5 m NaCl
d) 0.5 m NaCl < 0.5 m BaCl2 < 1 m KCl < 1 m Ba(NO3)2
Answer: d) 0.5 m NaCl < 0.5 m BaCl2 < 1 m KCl < 1 m Ba(NO3)2