Why does diet coke lose it's fizz when you put your finger in it?!
Why does diet coke lose it's fizz when you put your finger in it?
Answers:
Soda is obviously an acid...in order to break acid down, you need a lipid. Lipids are natural oils in the human body...they break down the hydrogen bonds that hold acids together. When you put your finger in it, the natural oils from your fingers break that bond and Voile`! You have a condensed soft drink (usually tastes nasty after that) lolz.
Source(s):
-I'm a Human Biology student going on to be a Lab Technician. (Lots of Chemistry classes)
I think it has something to do with the salt on your finger. I don't know.
It is the oils from your fingers. Grease!
It is oil. Works on any carbonated beverage, including champagne.
The different types of sweeteners used in the two products (reg and diet) causes different foaming behaviors.
In any case, I am not sure why the finger changes the situation because foam is collapsed by causing drainage of the liquid from the lamellar region (thin liquid film between bubbles). The aspartame in the diet Coke is making this drainage happen more slowly than the HFCS in the regular version. The diet's foam lasts longer and it looks like it fizzes more than the regular. And the two usually have the same amount of carbonation (assuming you opened them at
the same time and they were at the same temperature).
mine doesnt it just gets more fizzy for me
The surface of the skin is always slightly oily. The oil alters dramatically the surface tension of any liquid. This force allows the existence of bubbles (the fizz). Oily elements decrease locally the surface tension. It creates a hole in the bubble and it disappears. The fizz is a collection of bubbles. The oil doesn't mix well with the liquid and is ready for the next bubble when the former is out.