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A student adds a spoon full of powered sodium hydrogen carbonate to a flask containing ethanoic acid. List two main observations, he must note in his note book, about the reaction that takes place. Also write chemical equation for the reaction.

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When sodium hydrogen carbonate is added to a flask containing ethanoic acid, then
- brisk effervescence will be formed because of `CO_(2)` gas escaping from the reaction mixture.
- evolution of colourless and odourless gas. Some amount of heat is evolved during the reaction.
`CH_(3)COOH + NaHCO_(3) rarr CH_(3)COONa + H_(2)O + CO_(2)`
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