Why their is the same result when you add sugar and salt in the soda?

Answer 1

Because the chemicals combine from the soda and the water and that makes it get foam bubbles come out of it. Heres an expiriment that you can do to prove it is get a little bottle, it doesnt matter the size, and fill it up half ways with water, then when you are done with that you then get an alka-sezer & put it in (make sure you have a cap to cover it) close it real tight & hold it up over your head (make sure your out side so the sun can hit it) & if the cap comes off it works. PS. you SHOULD NOT use a soda bottle it will just not work.

Answer 2

I have four possible suggestions:

1) Dissolving salt in soda (mostly water) reduces the available solvent to dissolve carbon dioxide. Put another way, the increase in solutes requires a shift in the equilibrium; the easiest way to compensate is to release some carbon dioxide.

2) The salt crystals falling into the soda provides nucleation sites for carbon dioxide bubbles. These bubbles then make their way to the surface. This is related to choice four (below).

3) Dissolving NaCl alters the pH of the solution. Since solubility of carbon dioxide is a function of pH, this pH shift decreases the solubility of carbon dioxide, releasing CO2 gas.

4) If one treats the dissolution of CO2 as a colloidal suspension, adding the Na+ and Cl- electrolytes should precipitate the suspension. This precipitation would release gaseous carbon dioxide (though we usually precipitate solids...).

I'll do some research and repost.

*** Edit after research: (2) seems to be the most popular answer. Gas bubbles on the surface of salt crystals provide nucleation sites for larger bubbles of CO2. (4) seems okay, mostly as an alternative way of conceptualizing (2). It favors the idea that the carbon dioxide isn't dissolved well (or is supersaturated), but mostly stable. This seems to be true. (1) might be fine, but the bubbling occurs rapidly on adding salt (like, before it's fallen more than an inch), and salt does not dissolve significantly that rapidly. Note especially that the degassing of the soda solution ceases somewhat quickly, such that there's really just a spike in degassing as the salt is falling through the solution, and it stops when the crystals hit the bottom of the container.

(3) would be fine, as soda has a pH between 2.5 and 3.0 and salt water has a pH between 8.0 and 8.5, except that the solubility of carbon dioxide in water increases with increasing pH. This explanation also fails for the time scale reason mentioned just above.

The same thing happens with beer, because it's also got significant dissolved carbon dioxide. ****end edit.

Answer 3

The soda DOES NOT cool faster in cold water with salt. While it is true that water with salt dissolved in it freezes at a lower temperature, adding salt (NaCl) to ice water WILL NOT MAKE IT COLDER or change the temperature by a significant amount.

Heat is transferred because of a temperature gradient, or difference in temperature. The rate of heat transfer (through conduction and convection without bulk movement) will change with respect to the length which the heat must pass through, the area perpendicular to the direction of transfer, the properties of everything the heat must pass through and, as mention before, the difference in temperature. Adding salt will not change the convection coefficient significantly nor the temperature gradient.

However, unless the salt in question is KCl (potassium chloride) which actually pulls energy out of its surroundings to dissolve, thus decreasing the temperature of the water. But in ice water, it will not dissolve fast enough to make a significant contribution to temperature.

The rate at which things reach equilibrium cannot be obtained through thermodynamics but through rate laws. (In reference to the video where you got this idea)

And by the way, salt is used in making ice cream to prevent the freezing of the water so they can have a liquid bath at sub-zero temperatures.

So, if you want colder soda, plan ahead and keep your cans in the fridge.

Answer 4

The chemistry behind even the most simplistic of experiments can baffle most, such as the bubbling as a result of salt being added to soda. Soda itself is already "bubbly" due to its carbonation, but add a dash of salt and it bubbles even more violently than on its own. This bubbling effect has to do with the salt's alkaline nature and the release of carbon dioxide when it reacts with the soda.

Answer 5

The results are the same when you add sugar and salt to soda because they crystals are the same. If you look at salt and sugar crystals under a microscope they look and react similar.

Answer 6

because of chemical reactions.