The differences in the solubilities of ionic compounds in water typically depend on _____.
1. the relative affinities of the ions for each other
2. the affinities of the ions for water molecules
3. the molar mass of the compound
A) 1 only
B) 2 only
C) 3 only
D) 1 and 2
E) 2 and 3

Question

The differences in the solubilities of ionic compounds in water typically depend on _____.​
1. the relative affinities of the ions for each other
2. the affinities of the ions for water molecules
3. the molar mass of the compound
A) 1 only
B) 2 only
C) ​3 only
D) 1 and 2
E) 2 and 3

Quizplus · Accepted Answer

The solubility of ionic compounds in water depends on the affinities of the ions for each other and for water molecules. When an ionic compound dissolves in water, the ions are separated from each other by water molecules via the process of hydration. The affinity of the ions for water molecules determines how effective they are at disassociating from each other and being surrounded by water molecules. Additionally, the relative affinity of the ions for each other affects their ability to dissolve in water. If the attractive forces between the ions in the solid are stronger than their interactions with water molecules, the compound may not be very soluble. Therefore, both factors are important in determining the solubility of an ionic compound in water. The molar mass of the compound is not typically a significant factor in solubility.

The Differences in the Solubilities of Ionic Compounds in Water