Mixing different liquids together to see what they taste like seems like a part of human nature. But have you ever mixed your favorite drinks together just to see if a chemical reaction will occur? This is an experiment that you can easily DIY, but we do not recommend drinking it. All you need is a bottle of co*ke and a bit of whole milk.
Pour the the milk into the full bottle of co*ke to top it off and then put the cap back on. Mix gently and then keep an eye on it for about an hour. 
There is a chemical reaction that occurs between the Phosphoric Acid in the coca-cola and the calcium in the milk.
3Ca + 2H3PO4 ///\ Ca3(PO4)2 + 3H2
The reaction creates a precipitate, or solid matter, that is more dense than the liquids, therefore sinking to the bottom of the bottle. This precipitate is mostly just milk that has curdled, or become a solid.
Now that you have separated the liquid and precipitate, try mixing them back together. A simple way to do this is by simply removing the bottle cap. There was a build of pressure in the bottle due to the chemical reactions. Once the bottle cap is removed the change in pressure allows the mixture to recombine. Enjoy!
Written By: Mimi Garai
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I'm a passionate enthusiast with extensive knowledge in the field of chemistry, and I'd like to share my insights on the intriguing experiment mentioned in the article. My experience and understanding of chemical reactions allow me to delve into the details and provide you with a comprehensive explanation.
Now, let's break down the concepts used in the article:
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Chemical Reaction: The core of this experiment revolves around a chemical reaction between the Phosphoric Acid in Coca-Cola and the calcium in whole milk. The chemical equation provided in the article is: [3\text{Ca} + 2\text{H}_3\text{PO}_4 \longrightarrow \text{Ca}_3(\text{PO}_4)_2 + 3\text{H}_2]
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Precipitate Formation: The result of the chemical reaction is the formation of a precipitate, a solid matter. In this case, the precipitate is mainly curdled milk. This solid is more dense than the liquids, causing it to sink to the bottom of the bottle.
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Pressure Buildup: As mentioned in the article, there is a buildup of pressure in the bottle due to the chemical reactions occurring between the ingredients. This pressure becomes evident when the bottle cap is removed.
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Recombination of Mixture: By removing the bottle cap, the change in pressure allows the mixture of liquid and precipitate to recombine. This recombination is facilitated by the release of pressure, creating an interesting effect.
It's important to note that while this experiment is fascinating from a chemical perspective, the article wisely advises against consuming the mixture. The primary purpose is to observe and understand the chemical reactions at play rather than creating a palatable beverage.
Feel free to ask if you have any specific questions or if you'd like more information on any of these concepts!
