CHEMISTRY · Multi-part · AP · Chemistry · Chemical Reactions · Chemical Reactions
Problem
In a classroom demonstration, a 5-cm strip of magnesium ribbon is ignited in a Bunsen-burner flame and allowed to burn completely in air.
(1) Identify two distinct macroscopic observations that a student would record while the magnesium ribbon reacts.
(2) For each observation in part (a), state specifically how it provides evidence that a chemical change—not merely a physical change—has occurred.