Which gas is liberated when HCl is added to a sample of solidNa2CO3 ?a)Nitrideb)carbidec)carbon mono oxided)carbon dioxideCorrect answer is option 'D'. Can you explain this answer?

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Answer

Yes the crrct answr is 'D' bcoz when Na²CO³ reacts with HCl, it produces NaOH, H²O & CO².......... # Na²CO³ + HCl = NaOH + H²O + CO²

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Yes bcozzz...when acid(here hcl) reacts with metal carbonate(here na2co3) it forms salt and water as well liberates carbon dioxide....thats alll..

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Yes. 'D' is the right answer. How? So see when HCl is added to Na2CO3 we get NaHCO3 +NaCl and when more HCl is added to NaHCO3 we get NaCl + H2O and CO2 .

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Na2CO3+2HCL- 2NACL+H20+C02 Sorry no subscript available

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D is correct

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Option D is correct...

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Answer

When HCl (hydrochloric acid) is added to a sample of solid Na2CO3 (sodium carbonate), the gas liberated is carbon dioxide (CO2). This reaction can be represented by the following chemical equation:

2HCl + Na2CO3 → 2NaCl + H2O + CO2

Now let's break down the reaction and explain it in detail:

1. Formation of Sodium Chloride (NaCl):
HCl is a strong acid, and when it reacts with Na2CO3, it displaces the sodium (Na) ions from the carbonate (CO3) ions. This results in the formation of sodium chloride (NaCl). The balanced equation for this step is:

2HCl + Na2CO3 → 2NaCl + H2CO3

2. Decomposition of Carbonic Acid (H2CO3):
The carbonic acid (H2CO3) formed in the previous step is unstable and readily decomposes into water (H2O) and carbon dioxide (CO2). The balanced equation for this step is:

H2CO3 → H2O + CO2

3. Overall Reaction:
By combining the two previous steps, we can obtain the overall balanced equation for the reaction between HCl and Na2CO3:

2HCl + Na2CO3 → 2NaCl + H2O + CO2

Therefore, the gas liberated during this reaction is carbon dioxide (CO2).

It is important to note that carbon dioxide is a colorless and odorless gas. It is denser than air and can be easily identified by bubbling it through lime water (calcium hydroxide solution). Carbon dioxide reacts with calcium hydroxide to form a white precipitate of calcium carbonate, which makes the solution cloudy.

This reaction between HCl and Na2CO3 can be used as a simple test to identify the presence of carbonate ions in a sample. The liberation of carbon dioxide gas confirms the presence of carbonate ions.

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