Objective
The objective of this lesson is to learn about the chemical reaction that occurs when Mentos candy is dropped into a carbonated beverage, causing a volcano-like eruption.
Materials and Prep
- Mentos candy (preferably the mint flavor)
- A 2-liter bottle of diet soda (preferably cola)
- A safe outdoor space or a large basin to contain the eruption
- Protective eyewear and gloves
- Knowledge of the scientific principles behind the eruption (explained in the talking points)
Activities
Set up the experiment area in a safe and open space, away from any valuable items or people.
Put on the protective eyewear and gloves to ensure safety.
Open the bottle of diet soda and place it in the designated eruption area.
Unwrap the Mentos candies and drop them into the soda bottle all at once.
Observe and record the eruption height, duration, and any other interesting observations.
Repeat the experiment with different variables, such as using regular soda instead of diet soda or changing the number of Mentos used, and compare the results.
Talking Points
"The eruption is caused by a chemical reaction between the carbon dioxide gas in the soda and the rough surface of the Mentos candy."
"When the Mentos candy is dropped into the soda, it acts as a nucleation site, providing a surface for the carbon dioxide bubbles to form rapidly."
"The rough surface of the Mentos candy is covered in tiny pits and bumps, which increase the surface area available for carbon dioxide bubbles to form."
"The carbon dioxide bubbles quickly form and expand, leading to a rapid release of gas, causing the eruption."
"Diet soda is preferred for this experiment because it contains artificial sweeteners, such as aspartame, which can further enhance the reaction."
"The eruption height and duration can vary based on factors such as the number of Mentos used, the type of soda, and the temperature of the soda."