Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Vinegar and baking soda II
Name: scott m guzik
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: 1999 


Question:
Why do vinegar and baking soda react?



Replies:
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!
topper


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.

jschultz



Click here to return to the Chemistry Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (help@newton.dep.anl.gov), or at Argonne's Educational Programs

NEWTON AND ASK A SCIENTIST
Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory