# Transforming Carbon Dioxide into Rocks!? Experiments for Understanding Carbon Dioxide Removal through Chemical Weathering

## TL;DR

This paper introduces classroom experiments that demonstrate how carbon dioxide can be removed through chemical reactions with basalt, helping students understand real-world carbon capture methods.

## Contribution

The paper provides accessible, hands-on experiments for teaching carbon dioxide removal via chemical weathering in educational settings.

## Key findings

- Experiments using PET bottles and basalt demonstrate chemical weathering processes in a classroom setting.
- Students gain practical insights into carbon dioxide solubility and bicarbonate formation through sensor-based monitoring.
- The approach bridges educational gaps in carbon capture and storage concepts relevant to climate change discussions.

## Abstract

This paper presents a series of hands-on
experiments
designed to
teach principles of carbon dioxide removal through chemical weathering
in middle and high school chemistry classes. Chemical weathering is
demonstrated by the reaction of carbon dioxide dissolved in water
with basalt, forming bicarbonate. The experiments, which utilize simple
materials such as PET bottles, are safe and feasible for classroom
settings. Students are introduced to key concepts such as the carbon
dioxide solubility in water and the chemical processes that trap carbon
dioxide. The experimental design includes continuous monitoring of
dissolved carbon dioxide levels using membrane-based carbon dioxide
sensors and pH changes to visualize the progression of bicarbonate
formation. These activities provide students with practical experience
in carbon dioxide removal methods, mirroring real-world geological
processes, and enhance their understanding of their part in the carbon
cycle. In addition, the experiments also provide insight into fundamental
processes of carbon capture and storage based on the chemical weathering
of basalt. The accessibility of the materials, coupled with the relevance
to current global climate discussions, makes this a valuable addition
to chemistry education. This approach aims to fill the educational
gap on carbon dioxide removal, empowering students to engage in societal
discussions on the role of carbon capture and storage in the fight
against climate change.