why does soda water become more acidic when heated?!?
930326
sorry, you got it backwards.  soda water becomes less acidic when heated, as you evaporate the CO2, which IS acidic, and thus the soda water becomes LESS acidic.
564922
The baking soda we use for cooking is all made artificially.  You add salt (sodium chloride) and limestone (calcium carbonate) in ammonia- the limestone is there to produce CO2 gas.\n\n\nIn neutral or basic solutions, sodium bicarbonate is less water-soluble than sodium chloride. When carbon dioxide passes through a concentrated solution of sodium chloride and ammonia, sodium bicarbonate precipitates according to the following chemical reaction:\n\nNaCl + CO2 + NH3 + H2O ---> NaHCO3 + NH4Cl \nThe ammonia is necessary to buffer the solution at basic pH. Without it, a hydrochloric acid byproduct would render the solution acidic, and in acidic solutions, the reaction cannot proceed. In industrial practice, the reaction is carried out by passing concentrated salt water through two towers. In the first, ammonia bubbles up through the brine and is absorbed by it. It the second, carbon dioxide bubbles up through the brine and precipitates sodium bicarbonate.
546438
DO NOT add sodium bicarbonate! The pH is already too high. Bicarb will only COMPOUND the problem, not fix it. What you need is acid. Bicarb has an alkaline pH.
718611
The soda has more heat than the ice.  Heat energy travels from areas of greater heat to lesser heat.  The heat energy in the soda leaves the soda to go to the ice which in turn melts the ice, and leaves behind a cooler soda.\n\nHeat moves....cold doesn't.
593559
soda water is carbon dioxide dissolved in water under high pressure. on opening the bottle pressure decreses and hence carbon dioxide will escape from it
995669
It is a physical reaction, not a chemical one. Water molecules strongly attract each other, linking together to form a tight mesh around each bubble of carbon dioxide gas in the soda. In order to form a new bubble, or even to expand a bubble that has already formed, water molecules must push away from each other. It takes extra energy to break this "surface tension." In other words, water "resists" the expansion of bubbles in the soda.\n\nWhen you drop the Mentos into the soda, the gelatin and gum arabic from the dissolving candy break the surface tension. This disrupts the water mesh, so that it takes less work to expand and form new bubbles. Each Mentos candy has thousands of tiny pits all over the surface. These tiny pits are called nucleation sites - perfect places for carbon dioxide bubbles to form. As soon as the Mentos hit the soda, bubbles form all over the surface of the candy. Couple this with the fact that the Mentos candies are heavy and sink to the bottom of the bottle and you've got a double-whammy. When all this gas is released, it literally pushes all of the liquid up and out of the bottle in an incredible soda blast. You can see a similar effect when cooking potatoes or pasta are lowered into a pot of boiling water. The water will sometimes boil over because organic materials that leach out of the cooking potatoes or pasta disrupt the tight mesh of water molecules at the surface of the water, making it easier for bubbles and foam to form. \n\nWhen a scoop of ice cream is added to root beer, the "float" foams over for essentially the same reason. The surface tension of the root beer is lowered by gums and proteins from the melting ice cream, and the CO2 bubbles expand and release easily, creating a beautiful foam on top
788626
Have you ever seen a Mentos put into a soda before?  If not, the result is a mass explosion of soda.  The reason is because of a bad chemical reaction, not to mention that your tongue is divided into different parts for different tastes and while the taste of the mint is on its part and the soda blends with it, they attempt to overpower each other and result in "nastiness"
1025763
Mentos is not very dense and has air pockets in it.  Soda has a low pH and is considered much more acidic than the mentos mint, which is basic enough such that it gets dissolved by your own saliva.  When acids and bases mix, fizzing bubbling usually occurs.  In this case, carbon dioxide builds up in a sealed 2 liter bottle of soda.  The gas is building up and trying to escape, and with help of a little agitation, it ends up bursting through the top of the bottle.
328113
It's not a reaction, but rather the dissolution of a salt (usually ammonium nitrate) in water.  When you break the inner water pack, the ammonium nitrate dissolves.  This process for this particular salt is highly endothermic, that is it absorbs heat, reducing the temperature of the pack.\n\nA reverse reaction happens w/ instant heat packs, except us the salt precipitates (solidifies), an exothermic process, giving off heat.
282642
actually, pure water does not have a pH of 7.0, it is slightly acidic, around 5.6-5.8 from what i have seen at work.
391123
Pepsi is carbonated (contains bubbles of carbon dioxide).  This means that there is actually less volume of frozen liquid to be melted.
441451
Well, there's a decomposition reaction.\n\nH2CO3 <--> H2O + CO2\n\nCarbonic acid (H2CO3) doesn't not exist much at all, because it decomposes into H2O and CO2. But some of the carbonic acid remains, pushing up the hydronium concentration, which by definition makes water more acidic. Therefore, getting rid of the CO2 in water makes water less acidic (raising the pH).
479009
Pressure increases when dissolved gases come out of solution (leave their dissolved state and become a free gas).\n\nMany things will cause some of the dissolved carbon dioxide in soda to go from dissolved to gas form.  Heat, dissolving something in the soda that is more soluble than CO2 (like salt), impurities in the liquid, and shock or vibration - which create "nucleation" sites that the dissolved gas can collect around and become gaseous.\n\nShaking creates nucleation sites.
852194
Sodium carbonate has chemical formula Na2CO3. Sodium bicarbonate has chemical formula NaHCO3. Sodium carbonate is more alkaline than sodium bicarbonate thus sodium bicarbonate is more acidic. The definition of acidity is how many H+ ions are released when the substance is mixed with water. Since sodium bicarbonate actual contains H+ ions within it, it would obviously be more acidic.
456391
Because it contains a lot of sugar which in turn takes a lot of water for your body to process,there for you use more water to digest the soda than you get from it!
780518
I'm using the Lewis classification of acids and bases, okay? It's pretty much all that works in this case. I'll try to keep it simple.\n\nIt's more acidic than water because water is neutral (it can't accept any more electrons).\n\nIt's more acidic than other alcohols because the carbon chain is the shortest here. The longer the carbon chain is, the more electrons there are, so the chance of another electron being attracted to the molecule is pretty slim. Since there's only one carbon in methanol, the electronegativity of the oxygen atom prevails and attracts electrons to itself.\n\nI hope that was clear enough. Good luck!
739985
the water is relesed as vapor from the liquid when the liquid is heated. Water changes phase and becomes gas, its called evaporation.