Chemistry
Convert (i) NaHCO3 (ii) Na2CO3 to unstable carbonic acid by action with dil. H2SO4.
State the reason why ammonia is evolved when an ammonium salt and alkali are heated.
Acids Bases Salts
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Answer
2NaHCO3 + H2SO4 [dil.] ⟶ Na2SO4 + 2H2O + 2CO2 ⟶ H2CO3 (unstable)
Na2CO3 + H2SO4 [dil.] ⟶ Na2SO4 + H2O + CO2 ⟶ H2CO3 (unstable)
Ammonia is evolved when an ammonium salt and alkali are heated because a less volatile base (e.g.,NaOH) displace the more volatile base, NH4OH and we get the products NH3 and H2O.
NH4Cl + NaOH ⟶ NaCl + H2O + NH3
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