Question

From an experiment to study the properties of acetic acid. Answer the following questions:
a) Name the substances which on addition to acetic acid produce carbon dioxide gas. Give relevant chemical equation for the above?
b) How is CO₂ gas tested in the laboratory?

Answer 1

The reaction between baking soda and vinegar NaHCO3(s) + CH3COOH(l) → CO2(g) + H2O(l) + Na+(aq) + CH3COO-(aq)

To test the CO2 gas in a lab, bubble it through lime water.

If the lime water turns milky, it proves the test of carbon dioxide. 

Lime water turns milky as reacting with Carbon dioxide it forms Calcium Carbonate.

Answer 2

Hey friend,

The answer to your question is following;

a) Baking soda is the substance which when reacts with acetic acid releases carbon dioxide.

Following is the reaction between baking soda nd a type of acetic acid;

NaHCO3(s) + CH3COOH(l) → CO2(g) + H2O(l) + Na+(aq) + CH3COO-(aq)

b) In order to test carbon dioxide in a laboratory, add lime water in it. If the lime water start turning milky in complexion, it ensures the presence of carbon dioxide gas. The principle behind it is that lime water and carbon dioxide react together to form calcium carbonate which is basically the reason for the milky texture of lime water.

I hope the answer helped.

Thanks