Question

Acetic acid was taken in a test tube and sodium carbonate solution added through a funnel
a . which gas is evolved in this experiment?
b. Write one test to identify the gas.

Answer 1

a. Carbon dioxide
b. This gas turns lime water milky and also, it is produced with brisk effervescence..


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Answer 2

Answer:

For a: The gas evolved is carbon dioxide.

For b: It turns lime water milky.

Explanation:

• For a:

When acetic acid reacts with sodium carbonate, it results in the formation of many products.

The chemical equation for the above reaction is given as:

$2CH_3COOH(aq.)+Na_2CO_3(s)\rightarrow 2CH_3COONa(aq.)+CO_2(g)+H_2O(l)$

By Stoichiometry of the reaction:

2 moles of acetic acid reacts with 1 mole of sodium carbonate to produce 2 moles of sodium acetate, 1 mole of carbon dioxide and 1 mole of water.

Hence, the gas evolved during this reaction is carbon dioxide.

• For b:

To test the presence of carbon dioxide, we take lime water and pass this gas into lime water. We will see the turbidity starts to appear and lime water turns milky.