A student prepares 100 mL samples of Solution A and Solution B at 25 °C
CHEMISTRY · Multi-part · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A student prepares 100 mL samples of Solution A and Solution B at 25 °C. Both solutions use water as the solvent.
• Solution A is described as "a dilute aqueous solution of potassium nitrate, an ionic compound that fully dissociates."
• Solution B is described as "a concentrated aqueous solution of the covalent compound glycerol (C₃H₈O₃), which remains intact in solution."
(a) For each solution, identify the types of solute-derived particles that must appear in a correct particle-level diagram.
(b) Without assigning specific numbers, describe how the relative number of solute particles in equal-volume boxes should differ to reflect the words "dilute" and "concentrated."
(c) For Solution A, explain how the surrounding water molecules should be oriented around each solute particle type in the diagram and justify your reasoning in terms of intermolecular forces.