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Carbonated Drink vs Teeth

CYSF · 2025

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Overview

We will be testing whether or not teeth can withstand drinks that have been carbonated and observe the chemical changes along with physical changes.

Hypothesis

I believe coke will affect the eggshell the most because it has the lowest pH (most acidic) compared to Seven Up and Canada Dry. Since acid can dissolve calcium (which eggshells are made of), I think the Coca-Cola will cause the eggshell to break down faster than the other two drinks

Research

We learned that a carbonated drink has the chemical formula H2CO3 and the extra mix is the reason it is less dense than water. We also learned that Eggshells are mostly made of calcium carbonate (CaCO₃), which makes up almost 95-97% of the shell. The rest is made out of of proteins, such as collagen, and minerals.eggshells have tiny holes which makes the eggshell fresh. When eggshells come into touch with acids, a chemical reaction happens where the calcium carbonate reacts with the acid, releasing carbon dioxide Stronger acids (like hydrochloric acid) will dissolve the eggshell faster than weak acids (like vinegar or lemon juice). Soda’s have chemical ingredients that deteriorate things.This happens because of the acidity of the soda which makes the item slowly lose its texture

Variables

The eggshell The area The glass

Procedure

1. Make a hypothesis

2. Experiment trial 1

3. Trial 2

4. Trial 3

5. Make a conclusion analyse results

6. Repearsent results(graph,chart ext,)

Observations

I observed that the coke was the most acidic,due to it making the most impact on the shell because of the of calcium carbonate CaCO₃, which makes up almost 95-97% of the shell. The rest is made out of of proteins, like collagen, and minerals.

Analysis

Trial 1-coke-Most acidic

Trial 2-sprite most acidic

Trial 3-coke most acidic

Conclusion

the coke was the worst for your teeth i learnd that drinks may not be a smart investment for your future health growing up

Application

Carbonated drinks like Coke, Seven Up, and Canada Dry can affect your teeth because they are very sugary and acidic. The acid in these drinks can wear down the enamel (the hard outer layer of your teeth), and the sugar can cause cavities

Sources Of Error

i couldve cracked the eggshell more even bbut only a robot has that much precision to crack a eggshell perfectly done the middle 3 times

Citations

i acknolwged all websites and authors i have taken inspiration from

Title | Author | Information (web link, publisher, etc) | Year

Unacademy | | What is the Formula for Soda Water |

Merriam Webster | Merriam webster | Eggshell Definition & Meaning - Merriam-Webster | Could not find

Askifas powered by | Gary D. Butcher and Richard Miles | VM69/VM013: Concepts of Eggshell Quality | Feb 20,2019

pkp | Martin Au-Yeung, Kelin Hou, Leanne Lam, Andrew Yong Ton | https://unacademy.com/ | Could not find

Acknowledgement

all my teachers my friends my family

Awards (1)

  • HONOURABLE MENTION

Competition history

  • CYSF 2025 Category not listed

Resources

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Source: Calgary Youth Science Fair

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