This lab give students a hands-on experience when learning about how concentration affects chemical reaction rates. Students fill balloons with the same amount of baking soda and prepare solutions with two different vinegar concentrations. After students place the balloon over the flask, they lift up the balloon and allow the baking soda to mix with the vinegar. When the reaction is complete, students tie off the balloon. The size difference between the balloons is very clear. This listing includes background information, hypothesis, procedure, analysis questions, and conclusion questions.