Two aqueous solutions are prepared: 2.0 m Cu(NO₃)₂ and 2.0 m NaBr.Which of the following statements is true? A)The Cu(NO₃)₂ solution has a higher vapor pressure and lower freezing point than the NaBr solution. B)The Cu(NO₃)₂ solution has a higher vapor pressure and higher freezing point than the NaBr solution. C)The Cu(NO₃)₂ solution has a lower vapor pressure and lower freezing point than the NaBr solution. D)The Cu(NO₃)₂ solution has a lower vapor pressure and higher freezing point than the NaBr solution. E)None of these statements is true.

Question

Quizplus · Accepted Answer

The Cu(NO3)2 solution dissociates into three ions (Cu^2+ and 2 NO3^-), while NaBr dissociates into two ions (Na^+ and Br^-). More ions result in a lower vapor pressure and lower freezing point for the Cu(NO3)2 solution compared to the NaBr solution.

Two Aqueous Solutions Are Prepared: 2