Which of the following form the basis for the solubility of a solute in a given solvent? A. attractive forces between the molecules of the solute (cohesion) which must be broken or overcome B. all of these choices contribute to the solubility of a solute in a solvent, so this is the answer C. repulsive forces among the molecules of the solvent and the solute which must be broken or overcome D. attractive forces between the molecules of the solvent (surface tension) which must be broken or overcome
Question
Which of the following form the basis for the solubility of a solute in a given solvent?
A. attractive forces between the molecules of the solute (cohesion) which must be broken or overcome
B. all of these choices contribute to the solubility of a solute in a solvent, so this is the answer
C. repulsive forces among the molecules of the solvent and the solute which must be broken or overcome
D. attractive forces between the molecules of the solvent (surface tension) which must be broken or overcome
Solution
The correct answer is B. All of these choices contribute to the solubility of a solute in a solvent.
Here's why:
A. Cohesion, or the attractive forces between the molecules of the solute, must be overcome for the solute to dissolve. This is because the solute molecules must separate from each other to mix with the solvent molecules.
B. As stated, all of these factors play a role in solubility.
C. There can be repulsive forces between the molecules of the solvent and the solute that must be overcome. If these forces are too strong, the solute may not dissolve.
D. Surface tension, or the attractive forces between the molecules of the solvent, must also be overcome. The solvent molecules must separate to make room for the solute molecules.
Therefore, all of these factors - the attractive forces within the solute and solvent, and the repulsive forces between the solute and solvent - contribute to whether a solute will dissolve in a given solvent.
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