Q34 of 38 Page 1

When you add sodium hydrogen carbonate to acetic acid in a test tube, a gas liberates immediately with a brisk effervescence. None the gas and describe the method of its testing in the laboratory.

Carbon dioxide gas is released.


NaHCO3 + CH3COOH → CH3COONa + H2O + CO2


When this gas is passed through lime water it turns milky. It also extinguishes a burning splinter.


Ca(OH)2 + CO2 → CaCO3 + H2O


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