Alka-Seltzer Faster Use this activity to illustrate the relationship between water temperature and the time required for solids to go into solution and suspension. As water gets warmer, Alka-Seltzer takes less time to dissolve. When the water reaches the designated temperature, drop in two Alka-Seltzer tablets. Begin timing as soon as the tablets enter the water. Stop the watch when there is no more piece of tablet effervescing, and record the time.
Students can plot and interpolate their results on a cooperative effort graph.