This is a station lab, so the teacher must read through each station and prepare each station accordingly.
I write on a piece of paper "Station 1" etc for each station in addition to the attached lab.
Students should do this lab in groups of 2-3.
The teacher should give each group 2 minutes at each station and then say "switch".
The station that has students use alka seltzer tablets and a candle may need to be done as a demo by the teacher. I did it as a demo for safety concerns.
Students can complete the attached lab questions and analysis during or after the lab.