Please answer the following questions and include reference
1)If we mixed plaster of Paris with water, let it harden, and then tried to repeat the process with this hardened product and water. What was the macroscopic evidence that a chemical reaction had taken place? If we had a powerful microscope, would we see microscopic evidence that a chemical reaction had taken place? Answer the same questions for the "cheese candle" that the hosts burned at the end of the program.
2) On one pan we puts an uncovered container of water and an Alka-Seltzer tablet. On the other pan he puts an uncovered container of water and places an Alka-Seltzer tablet in the water. As the Alka-Seltzer fizzes in the water, what do you think will happen to the pan holding the fizzing Alka-Seltzer?