Why do fizzy drinks stop fizzing if they are added to alcohol?


For example; if I have a glass of Whiskey and add Coca Cola to it, the Coca Cola will not fizz and foam up

In: Chemistry

They only stop fizzing if you put the alcohol into the carbonated beverage.

If you want your drink to stay fizzy, first pour the alcohol into the glass, then the carbonated liquid.

I don’t quite remember what happens or the proper term, but you upset the carbon dioxide (fizz) when you pour other liquids into it.

Looks like two reasons – according to the same question on [Ask Science](https://www.reddit.com/r/askscience/comments/3t8ky2/why_does_soda_stop_fizzing_when_you_add_alcohol/)

Soda is supersaturated with carbon dioxide (the excess carbon dioxide gas is what causes the bubbles). Water holds a lot less Carbon Dioxide gas than Ethanol (alcohol). When you add alcohol to a drink, the amount of carbon dioxide it can hold goes up, so you’ll see a reduction in the number of bubbles.

The other reason given has to do with surface tension. The higher the surface tension, the soda has a much higher surface tension than alcohol. Adding alcohol reduces the surface tension allowing the gas to escape, reducing the number of bubbles.

If you add the soda to the alcohol (as u/livingwithbacon suggests) my guess is you would see an increase of bubbles from dumping the soda. In the end, either method should have a similar soda after it’s settled down, (maybe better mixed by adding soda) but you would have more bubbles immediately after pouring in the soda, which might be a preference if you’re drinking it immediately.