Which of the following solutions has the lowest osmotic pressure? A) 0.10 M Al(NO₃)₃ B) 0.20 M NH₃ C) 0.15 M Ba(NO₂)₂ D) 0.10 M CaCl₂ E) 0.15 M NaCl

Question

Quizplus · Accepted Answer

Osmotic pressure depends on the concentration of particles in solution. NH3 is a non-electrolyte and does not dissociate into ions, so its particle concentration is 0.20 M. The other solutions dissociate into multiple ions, resulting in higher effective concentrations and thus higher osmotic pressures.

Which of the Following Solutions Has the Lowest Osmotic Pressure