Problem 1. Which physical state was the Alka-Seltzer in before the reaction occurred?
Problem 2. What physical state(s) were the Alka-Seltzer/water mixture in during the reaction?
Problem 3. What happened to the temperature of the water as the reaction occurred?
Problem 4. Based on the indicators of chemical reactions, did a chemical change occur? How do you know?
5. Based on your observations, did a phase change occur? How do you know?
Problem 6. Was the reaction of mixing water and Alka-Seltzer endothermic or exothermic? How do you know?
Problem 7. What was the most interesting observation you made while you were collecting your data? Was this recorded on your table?
Problem 8. Why is it important to make qualitative observations during a lab in addition to quantitative observations?
Problem 9. How would you improve the way you collected your data in this lab?