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ICSE Class 10 Chemistry Question 1 of 63

Study of Compounds — Nitric Acid — Question 2

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Question

Question 2

Give a word equation and balanced molecular equation for the laboratory preparation of nitric acid from :

(i) KNO3

(ii) NaNO3.

Answer

(i) Potassium Nitrate [Nitre] + Sulphuric acid [conc.] ⟶ Potassium bisulphate + Nitric acid [vapours]

KNO3[conc.]+H2SO4[conc.]→<200°CKHSO4+HNO3\text{KNO}_3 [\text{conc.}] + \text{H}_2\text{SO}_4 [\text{conc.}]\xrightarrow{\lt 200 \degree\text{C}} \text{KHSO}_\text{4} + \text{HNO}_\text{3}

(ii) Sodium Nitrate [Chile salt petre]+ Sulphuric acid [conc.] ⟶ Sodium bisulphate + Nitric acid [vapours]

NaNO3[conc.]+H2SO4[conc.]→<200°CNaHSO4+HNO3\text{NaNO}_3 [\text{conc.}] + \text{H}_2\text{SO}_4 [\text{conc.}]\xrightarrow{\lt 200 \degree\text{C}} \text{NaHSO}_\text{4} + \text{HNO}_\text{3}