M Prep | MCAT 2015 Question of the Day - Prep, Practice Questions, and More!

Q:	Two solutions are separated by a semipermeable membrane allowing only water to flow through. In one solution, 1 mole of CaCl₂ is added while in the other solution, 1 mole of NaCl is added. Water will flow from the NaCl solution into the CaCl₂ solution because:

the calcium ion is larger than the sodium ion.

there are more moles of ions in the CaCl₂ solution than in the NaCl solution.

calcium is divalent while sodium is monovalent.

calcium is more electropositive and has a stronger affinity for water.