A fixed–volume container shows a particulate–level diagram of an aqueous solution
CHEMISTRY · Multi-part · AP · Chemistry · Properties of Substances and Mixtures · Properties of Substances and Mixtures
Problem
A fixed–volume container shows a particulate–level diagram of an aqueous solution. In the description below, each “sphere” represents one particle at the nanoscale.
• 90 small, bent, V-shaped particles, each consisting of one large central red atom connected to two smaller white atoms at an angle of about 105°.
• 6 larger purple spheres, each of which remains intact and is dispersed uniformly among the V-shaped particles.
No other particles are present.
Answer the following in relation to this particulate representation of the mixture.
(a) Identify which species acts as the solvent and which acts as the solute in the mixture.
(b) Justify your answer in part (a) by referring explicitly to information available from the particulate representation rather than to macroscopic intuition.
(c) Describe two specific changes that would be visible in the particulate diagram if a second sample were prepared that is twice as concentrated in the solute while the volume of the container remains the same.