Well this little experiment is a tad gross…but I think I’d like to challenge someone to drinking the mixture after it sits for an hour or so!
So what actually happens when you mix Coke with milk?
It is a reaction of the Phosphoric Acid contained in the coca cola to the milk. Phosphoric Acid molecules attach to the milk giving them more density and separate out while the remaining liquid that makes up the milk and cocoa cola now being lighter floats on top. The solid matter is basically milk that has been curdled by the addition of the more acidic soda.
Both items are acidic but coca-cola more so. In general, coca-cola has a pH of anywhere from 2.5-4.5 because of the Phosphoric Acid content where milk has a normal pH around 6.7 (almost neutral, milk that is in the base range is usually mastitic).
There are some studies to suggest that because of the high Phosphoric Acid content in most soft drinks that they can help to increase the likelihood that a person will develop Osteoporosis if they aren’t getting enough Calcium in their diet.
Coca-cola makes an excellent household cleaner – it can be used to take tarnish off of pennies and it is actually recommended to de-grease car engines.
…and this is why I don’t drink soda!
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