What Is the Equation for the Reaction Between Baking Soda and Vinegar?
The reaction between baking soda ( sodium bicarbonate
) and vinegar (dilute acetic acid
) generates carbon dioxide gas, which is used in chemical volcanoes and other projects. Here is a look at the reaction between baking soda and vinegar and the equation for the reaction.
The reaction between baking soda and vinegar actually occurs in two steps, but the overall process can be summarized by the following word equation:
baking soda (sodium bicarbonate) plus vinegar (acetic acid) yields carbon dioxide plus water plus sodium ion plus acetate ion
The chemical equation for the overall reaction is:
NaHCO 3 (s) + CH 3 COOH(l) CO 2 (g) + H 2 O(l) + Na + (aq) + CH 3 COO - (aq)
with s = solid, l = liquid, g = gas, aq = aqueous or in water solution
Another common way to write this reaction is:
NaHCO 3 + HC 2 H 3 O 2 NaC 2 H 3 O 2 + H 2 O + CO 2
The above reaction, while technically correct, does not account for the dissociation of the sodium acetate in water.
The chemical reaction actually occurs in two steps. First, there is double displacement reaction in which acetic acid in vinegar reacts with sodium bicarbonate to form sodium acetate and carbonic acid:
NaHCO 3 + HC 2 H 3 O 2 NaC 2 H 3 O 2 + H 2 CO 3
Carbonic acid is unstable and undergoes a decomposition reaction to produce the carbon dioxide gas:
H 2 CO 3 H 2 O + CO 2
The carbon dioxide escapes the solution as bubbles. The bubbles are heavier than air, so the carbon dioxide collects at the surface of the container or overflows it. In a baking soda volcano, detergent usually is added to collect the gas and form bubbles that flow somewhat like lava down the side of the 'volcano'. A dilute sodium acetate solution remains after the reaction.
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