A textbook presents the following verbal description of two particulate diagrams
CHEMISTRY · Multi-part · AP · Chemistry · Chemical Reactions · Chemical Reactions
Problem
A textbook presents the following verbal description of two particulate diagrams, each representing an equal-volume sample in a transparent container at room temperature.
• Diagram 1 (before mixing): The left side of the container shows only red spheres that are NOT bonded to one another. The right side shows only blue spheres that are NOT bonded to one another. Both sides contain the same total number of spheres, and all spheres are evenly dispersed in their respective halves.
• Diagram 2 (after 1 minute): The contents of the two halves have been thoroughly mixed. Every red sphere is now bonded to a blue sphere, forming red–blue pairs. No unpaired spheres of either color remain. The red–blue pairs are evenly dispersed throughout the entire container.
(1) Based solely on the information above, predict one visible macroscopic change (if any) that an observer would notice when the sample transitions from the state depicted in Diagram 1 to the state depicted in Diagram 2.
(2) Explain how the change in bonding patterns at the particulate level supports your prediction in part (a) and provides evidence that a chemical reaction has taken place.
(3) Identify ONE common piece of laboratory equipment (other than the observer’s eyes) that could be used to collect additional evidence for the change you predicted, and briefly describe the type of data it would provide.