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A chemical change occurs. What you get is two separate reactions that happen simultaneously. The first is a double-replacement reaction where the products are sodium acetate and carbonic acid:

NaHCO3 + HC2H3O2 --> NaC2H3O2 + H2CO3

The second is a decomposition reaction involving the carbonic acid, and the products are water and carbon dioxide:

H2CO3 --> H2O + CO2

The CO2 are the bubbles you see in the reaction. This reaction is endothermic, meaning it gets cooler. It also makes a big foamy mess.

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12y ago

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