Shaking a can of soda before you open it isn"t too smart, unless you understand the scientific research going ~ above inside.

You are watching: Which soda has the most fizz science fair project

In some circles, it’s considered negative manners to shake a have the right to of soda just prior to giving it come a thirsty friend. The unexpected w-h-o-o-s-h the soda and also foam is a sure way to damn someone’s day. If a “friend” of yours thinks it’s cute to hand you a deserve to that’s just been shaken, smile, perform what you should do, and also then open up the have the right to to a gasp of amazement… from the other person. Scientific research know-how can help you in the funniest ways.

Experiment Materials

Unopened can be ~ of cola (diet and regular) Water and paper towels for clean up A handy sink or pan Adult supervision

Scroll under To:

Experiment Videos




(You could want to practice with cans of society soda. It’s clear and also not sticky.) vigorously shake a sealed deserve to of regular cola.

Invite a ready friend to instantly open the can over a sink or pan. It’s feasible that there might be a few taps offered to the height of the can. Many people do this the end of habit.

Odds are, however, as soon as the shaken have the right to is opened, there will be a surging of cola and foam the end of the opening.

Clean increase the mess and share what’s left that the soda in the can.



Grab another unopened have the right to of regular cola and also shake it as you walk before. Prior to you open up it this time, however, flick the the sides the the deserve to hard v a finger. Go all the method around the can, too. Give the can a 4 minutes 1 turn and snap again. Snap and also turn the the can around six times before opening it.

Open the can gradually to share the non-foaming and non-spewing drink with your friend.

Do the very same shaking and also can tapping with a diet cola however open it end the sink. Your technique is not bad; it’s the diet formula in the can.

How Does that Work

Since the fizz in soda is actually dissolved carbon dioxide gas (CO2), the score is to store as much of it in the liquid as possible. Soda fizzes as soon as dissolved CO2 is exit in the kind of bubbles. At the bottling plant, carbon dioxide molecules are forced into the liquid in amounts much greater 보다 would dissolve in normal atmospheric pressure. There’s a lot of pressure being applied to execute this. In addition, the fluid is an extremely cold. As it warms up in the sealed can, the CO2 wants to come the end of solution but the have the right to is strong enough to organize it in there. As shortly as you open the can, some of the excess gas escapes but the liquid and the staying gas continue to be inside.

Shaking an unopened can of soda reasons bubbles of CO2 to cover the inside walls of the can. They kind on imperfections in the metal referred to as nucleation points. Once you open a shaken can, the push in the liquid drops quickly and the volume the a billion or so CO2 bubbles increases instantly (check out Boyle’s Law). Whoosh! The quickly widening bubbles pressure any liquid over them out of the deserve to as a foaming mess.

Some people think tapping the peak of the can before opening it stays clear of this mess. This actually does very small to the bubbles. The trick is come dislodge them from the side walls and bottom that the can so they have the right to scoot to the peak of the liquid (because gas is much less dense than a liquid). When the bubbles room at the peak of the can, there will be little or no fluid blocking their escape when you open it. As a result, the soda doesn’t spray. Remember, snap the side rather of tapping the top.

Take that Further

Once you’ve mastered the an approach on regular cola in cans, hone your talents on various kinds and also containers the soda. You’ll uncover that it’s probably simpler to set the containers (even the cans) ~ above a difficult surface to smack them v a finger. It gives you far better control and allows more power to enter the smack.

See more: How Many Miles From Miami To Naples, Distance Between Miami, Fl And Naples, Fl

Watch the end for diet sodas, however! There’s no guarantee that even snapping the next of a deserve to of diet soda will prevent getting sprayed when you open a shaken can. Some scientists speculate that diet sodas contain more CO2 while others think there’s some distinct interaction in between the synthetic sweetener, the preventive used, and also the carbonated water. At this point, no one fully understands the reason. So, if you pick to open a shaken have the right to of diet soda… well, you’re on your own.