A student sketches a particulate diagram for a solution prepared by dissolving…
CHEMISTRY · Multi-part · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A student sketches a particulate diagram for a solution prepared by dissolving crystalline NaCl and table sugar (sucrose) in water. The drawing is described verbally below for a fixed-volume container.
• 60 V-shaped particles with one red and two white atoms (water).
• 8 small green spheres and 8 small pink spheres, each green sphere paired closely with a pink sphere but not attached to any other atoms.
• 5 intact cage-like clusters made of carbon, hydrogen, and oxygen atoms bonded together; none of the atoms in these clusters are separated from the cluster.
Respond to the prompts about the student’s diagram.
(a) Identify the solvent present in the diagram.
(b) For each solute depicted, state whether it is acting as an electrolyte or a nonelectrolyte in this solution and cite evidence from the particulate representation to support each classification.
(c) Compare the relative concentrations of the two solutes on a particle-per-particle basis, and explain how the diagram supports your conclusion.