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When you add sodium hydrogen carbonate to acetic acid in a test tube, a gas liberates immediately with brisk effervescence. Name this gas. Describe the method of testing this gas.
When a pinch of sodium hydrogen carbonate is added to acetic acid in a test tube, a brisk effervescence is produced because of the liberation of carbon dioxide gas.
When this gas is passed through the lime water, it turns lime water milky. This shows that the gas liberated is carbon dioxide gas.
The chemical equation for the reaction is given below:
$CH_3COOH + NaHCO_3 \rightarrow CH_3COONa + H_2O + CO_2$
ethanoic acid + sodium bicarbonate → sodium acetate + water + carbon dioxide
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