Two aqueous solutions are prepared: 2.0 m Cu(NO 3 ) 2 and 2.0 m NaBr. Which of the following statements is true?

The Cu(NO3)2 solution has a lower vapor pressure and lower freezing point than the NaBr solution because it dissociates into more ions (3 ions: Cu^2+ and 2 NO3^-) compared to NaBr (2 ions: Na^+ and Br^-), leading to a greater colligative effect.

Two aqueous solutions are prepared: 2.0 m Cu(NO 3 ) 2 and 2.0 m NaBr. Which of the following statements is true?

The Cu(NO3)2 solution has a lower vapor pressure and lower freezing point than the NaBr solution because it dissociates into more ions (3 ions: Cu^2+ and 2 NO3^-) compared to NaBr (2 ions: Na^+ and Br^-), leading to a greater colligative effect.

Solved

Two Aqueous Solutions Are Prepared: 2

Question 60

Multiple Choice

Two aqueous solutions are prepared: 2.0 m Cu(NO₃) ₂and 2.0 m NaBr. Which of the following statements is true?

A) The Cu(NO₃) ₂solution has a higher vapor pressure and lower freezing point than the NaBr solution.
B) The Cu(NO₃) ₂solution has a higher vapor pressure and higher freezing point than the NaBr solution.
C) The Cu(NO₃) ₂solution has a lower vapor pressure and lower freezing point than the NaBr solution.
D) The Cu(NO₃) ₂solution has a lower vapor pressure and higher freezing point than the NaBr solution.
E) None of the above statements is true.