The clever folks over at Unilad decided it was time to finally address the age old question of—"Does Tapping Your Can Actually Stop The Drink Fizzing Up?"
I mean, maybe it's not age old, but it's definitely one of those annoying things that it would be nice to have a definitive stance on. Otherwise, we'd all be walking around tapping cans like morons without ever really knowing the truth!
To weigh in further, Christopher Arthur Edward Hamlett, a chemistry lecturer from Nottingham Trent University, explained what's actually going on inside, you know, like from a fancy scientific perspective—
"Before the can is opened, microscopic gas bubbles attach to the inside of it (nucleation). When the can is opened, these bubbles increase in size, due to the decrease in the solubility of CO2.
When these bubbles reach a certain size they detach from the inside of the can and rise up to the top of the can due to buoyancy and displace liquid in their path.
So what part could tapping the top of the can play in this process? As described earlier, the bubbles in an unopened can nucleate at the walls, so tapping the can before opening could dislodge some of the bubbles, enabling them to float to the top of the liquid.
When a can is opened, the bubbles expand with those deeper within the liquid travelling further than those near the surface, displacing m"ore of the drink and possibly resulting in greater amounts of ejected liquid.
A 'tapped' can will have fewer of these 'deep' bubbles and so less liquid will be dislodged – and possibly sprayed out – than an 'untapped' can."
I'd say between Unilad's video and the smart guys explanation, ya'll can continue to tap away at those fizzy drinks!!