Vinegar and Tums
Name: Don P.
Date: Saturday, October 12, 2002
I have seen lots of baking soda plus vinegar
questions and answers, but I was wondering what the formula was for a ant-acid (Tums)
plus vinegar reaction was. Can you help?
Tums is mainly calcium carbonate (CaCO3). Vinegar is mainly acetic acid
(HC2H3O2). The reaction goes like this:
CaCO3 + 2 HC2H3O2 ==> Ca(C2H3O2)2 + H2CO3
The H2CO3 (carbonic acid) is unstable. It disproportionates (decomposes)
into CO2 (gas bubbles) and H2O
The active ingredient in Tums is calcium carbonate, CaCO3, and in vinegar
is acetic acid, CH3CO2H.
The reaction is:
CaCO3 + 2 CH3CO2H ----> CO2 gas + H2O + Ca(+2) + 2
Not much different. Baking soda is sodium bicarbonate, the active
ingredient in Tums is calcium carbonate.
CaCO3 + 2 CH3COOH --> Ca(CH3COO)2 + H2O + CO2
Richard E. Barrans Jr., Ph.D.
Director of Academic Programs
PG Research Foundation, Darien, Illinois
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Update: June 2012