Introduction:
*(The group in this project is the same group I worked on with in the 5th Grade Curriculum Project. Here's a link in case you are interested)*
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In this project, my group (Amritha S & Dalton S) and I worked on something called Chemical Dominoes. It is similar to the Rube Goldberg Physics project I did in my first year of STEM, but with Chemistry as well! We had to use at least 3 chemical reactions in the process, be able to explain our 3 chemical reaction, and conduct a video of it. Also, if you are not sure what a Rube Goldberg project, the button on the left will take you to my 9th grade page.
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Explanation & Process:
Balloon- Lever Experiment:
Here, the reaction of two substances caused the inflation of the balloon: acetic acid (HC2H3O2) and sodium bicarbonate (NaHCO3). Their more familiar terms are vinegar and baking soda. These two products combine and form three products: Sodium acetate (NaC2H3O2 aq), water (H2O), and carbon dioxide (CO2). The carbon dioxide gas is what causes the balloon to inflate and rise so that it can hit the lever. The reaction is both a double replacement and decomposition reaction. Formula: NaHCO3 + HC2H3O2 --> NaC2H3O2 + H20 + CO2 |
Double Displacement Reaction (clear to yellow):
As can be seen from the title, this reaction was a double displacement reaction, in which the combination of Lead (II) Nitrate and Potassium Iodide results in a bright yellow precipitate, which is formed by the lead iodide formed. In this double displacement reaction, the anions and cations switch partners, forming a solid precipitate. Formula: 2KI(aq) + Pb(NO3)2 --> PBI2 + 2KNO3 |
Elephant Toothpaste:
For Elephant Toothpaste, we combined 3% Hydrogen Peroxide, dry yeast, warm water, dish soap, and green food coloring. The reaction is caused by the rapid decomposition of hydrogen peroxide, which leads to the production of steam, oxygen gas, and energy. The free iodine ion produced by the hydrogen peroxide is the catalyst, and because the reaction gives off heat, it is exothermic. Formula: 2H2O (aq) --> 2H2O (g) + O2 + energy |
Video:
This video was really fun to make. My group and I were only able to catch the whole experiment work once. That one time wasn't caught on video ;_; . So, we decided to compile all the moments in the project into a sweet looking video. To make up for me not doing much of the setting up of the project and chemical reactions displayed, I edited the video for my group and added my own music I made through Garage Band. Hope you enjoy!
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Reflection: This project reminded me a lot of my Rube Goldberg project I did in my first year of high school. This previous knowledge helped my group and I briefly use Physics while mostly working on the Chemistry side of it. It was a ton of fun and I really enjoyed working with my team. Coming up with ideas, setting up cool chemical reactions into our Chemical Dominoes, and talking to my group was a blast. I also hope the short video I made above makes up for the brief work I did on the Chemical Dominoes and reactions. I hope that for the future I am able not just to make videos for my group, but also be more "hands-on" involved. Overall, my group was really cool to hangout and work with, I can improve on my involvement in future groups, and I enjoyed seeing this project come about! :D
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