why do sodas fizz up when you pour too much in at once?

Question

why do sodas fizz up when you pour too much in at once?

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Answer 1

It’s full of CO2. You pouring too fast agitates the liquid and forces the CO2 out of solution faster causing lots of foam and bubbles. It’s like shaking a bottle of soda and then trying to open it, explosion. If you more it slow and smooth the gas stays in solution and you don’t get as much foam/fizz