When we got back from Christmas Break, I realized that we still hadn’t done any labs to explore the effect of concentration on reaction rates. Frustrated from how our previous labs had gone, I decided to just do a whole-class demonstration so we could move on to the next skill.
We worked together to create three different concentrations of water and vinegar in three graduated cylinders. We measured the same amount of baking soda into three balloons that would be placed over the graduated cylinders to produce a closed system.
Three students stood behind the graduated cylinders and lifted up the balloons at the exact same time to release the baking soda into the vinegar/water mixtures. Of course, we made lots of predictions first.
Here’s a video of our reactions taking place. If the embedded video doesn’t show up below, here is a direct link to the video. You can hear how excited my students were!
More Resources for Teaching Chemical Reactions
- Balancing Equations Worksheet
- Reaction Rate Summary Notes
- Effect of Concentration on Reaction Rate Lab
- Rust Lab
- Effervescent Tablet Lab
- Glow Sticks Reaction Rate Lab
- Types of Systems Foldable
- Predicting Products of Chemical Reactions Foldable
- Classifying Reactions Foldable
- Types of Chemical Reactions Foldable
- Writing and Balancing Chemical Equations Foldable
- Balancing Equations Foldable
- Predicting Products Review Game
- Diatomic Elements BrINClHOF Poster
- Classifying Types of Reactions Card Sort Activity