The normal temperature range of the liquid phase of pure water is 0 $\circ$ C to 100 $\circ$ C. Which of the following solutions will have the largest temperature range for the liquid state?
A)1 M aqueous ethanol solution
B)1 M aqueous potassium bromide solution
C)1 M aqueous acetic acid solution
D)1 M aqueous magnesium bromide solution
E)1 M aqueous magnesium sulfate

Question

Quizplus · Accepted Answer

Magnesium bromide (MgBr2) is an ionic compound that, when dissolved in water, dissociates into magnesium ions (Mg2+) and bromide ions (Br-). This dissociation results in the solution having a higher boiling point and a lower freezing point compared to pure water due to the colligative properties of solutions. Among the options given, magnesium bromide solution will have the largest number of particles in solution after dissociation (three particles per formula unit), which leads to the greatest depression of the freezing point and elevation of the boiling point, thus resulting in the largest temperature range for the liquid state.

The Normal Temperature Range of the Liquid Phase of Pure ∘\circ∘

The Normal Temperature Range of the Liquid Phase of Pure $\circ$