Ethanoic acid reacts with sodium carbonate solution. Which observation would confirm this reaction is occurring?

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Question

Ethanoic acid reacts with sodium carbonate solution. Which observation would confirm this reaction is occurring?

Accepted Answer

- Bubbles of gas are produced and the gas turns limewater milky — Carboxylic acids react with carbonates to produce carbon dioxide gas, water, and a salt. CO2 turns limewater milky, confirming its presence. A white precipitate would suggest a precipitation reaction, not relevant here. A colour change to orange is associated with dichromate oxidation tests. A sweet-smelling layer indicates ester formation, which requires an alcohol and acid catalyst, not a carbonate.

Answer

- The solution changes from colourless to orange

Answer

- Bubbles of gas are produced and the gas turns limewater milky

Answer

- A sweet-smelling liquid layer forms on the surface

Answer

-  A white precipitate forms in the solution

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