Instructions (Part I): Carefully open your Alka-Seltzer tablets, fill a cup with water, and set out your film canisters. In preparation for explosion, create an open/safe space that can be easily cleaned up.
Instructions (Part II): Using your method outlined in your notes, begin testing various combinations of Alka-Seltzer tablets and water. Make a detailed recording of your data and results for each combination. The example video is below for your reference if needed. Set aside one packet of Alka-Seltzer and one clean film canister that you do not use.