In an investigation to determine the solubility of NaCl in water, methanol and hexane, a student adde 40.0 g of NaCl to 100.0 ml of each liquid maintained at a temperature of
25’ c. after 2 minutes of stirring each mixture, the mass of undissolved salt was determined through filtering the mixture and weighing the residue. the results of the investigation are shown below.

liquid Mass of NaCl (s)
Recovered by filtration
hexane 39.9
methanol 38.6
water 3.85
a .
place the liquids tested in order of their increasing solubility of NaCl

b.
explain the trend in solubility of NaCl in the three liquids using your knowledge of the process by which ionic solids dissolve and the intermolecular forces involved.