Vinegar and baking soda II
Name: scott m guzik
Why do vinegar and baking soda react?
Vinegar contains a lot of acetic acid; baking soda is sodium
bicarbonate. When sodium bicarbonate dissolves into the vinegar,
it reacts with water and forms OH-, which reacts with the acetic
acid (OH- is base) to form water.
Short it's an acid-base reaction.
Hope that helped!
The fizz though is the formation of carbon dioxide gas.
Bicarbonate is HCO3-. The reaction:
HCO3- + H+ (from the vinegar) ---> H2CO3 (carbonic acid)
Carbonic acid quickly break into water and carbon dioxide:
H2CO3 ---> H2O + CO2
Hence the fizzing.
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Update: June 2012