INFO/ SCIENCE BEHIND ON BAKING S0dA AND VINEGAR REACTION?

Question

can someone please give me some information on this subject? like things that happen or websites with information that might be useful? i've been looking for background science and cant find mutch.

things i am not looking for,
i dont want messages saying
"find your own stuff"
or
"do ur own work"
so ya that gets me mad so if someone says any spam like that i will report abuse on u

background info on baking soda+vinegar?
(writing a 2 page essay the more the better! history about it and other things might help too.)

i might not be on for a while probably going to bed so if u give me a good response i will rate u high and get u lots of points

Answer 1

sodium carbonate and bicarbonate acts as bases which reacts with the acetic acid in vinegar. Vinegar is 5% acetic acid, which is about 0.8 M in molar conc.

The sodium carbonate is the second salt in the two-step dissociation of carbonic acid, the weak acid formed from the dissolution of CO2 in water. The carbon dioxide in the air is sufficient to drop the pH of rain, even without other acid-producing pollutants, to 5.6. Soda has a much higher CO2 content, so its pH is lower. Carbonic acid has the structure O=C-(OH)2. Both hydrogen's can be ionized off.

When the first hydrogen is ionized, the remaining ion is called the HCO3- or bicarbonate ion. When the second hydrogen is ionized, the remaining ion is called the CO3= or the carbonate ion. If a base is added to the carbonic acid gradually, at pH 7 or so, the HCO3- will be about the same conc as the H2CO3 conc. At higher pH, the H2CO3 level decreases sharply and the bulk of the species in water is the bicarbonate. However, around pH 10 or so, the second step kicks in, and the CO3= will be about the same conc as the HCO3- conc. At higher pH, the CO3= is the predominant species in water.

Sodium carbonate is relatively cheap, and is used in baking processes to provide CO2 gas to fluff up baked items. However, the pure carbonate is fairly caustic, since it causes the pH to be about 12 or so in 1 M or more solutions. So sodium bicarbonate is added to lower the pH to a more tolerable level.

When vinegar reacts with this mixture, the process described above with the base reacting with carbonic acid is reversed. The reaction of acetic acid with the bicarbonate generates heat, which causes the carbonic acid formed in the reaction to revert to carbon dioxide and water. This helps drive this reaction, leaving behind sodium acetate in water.

Answer 2

here is a site that might give you a little bit of an explanation as to why Baking Soda and Vinegar react the way they do.

http://library.thinkquest.org/3347/vinegar+bsoda4.html

Answer 3

ethanoic acid + sodium hydrogencarbonate ---> sodium ethanoate + carbon dioxide + water Bubble the gas evolve into limewater. A white precipitate is noted and this confirms the presence of carbon dioxide gas.

Answer 4

NaHco3 + CH 3COOH = CH3COONA + H20 + CO2