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ICSE Class 10 Chemistry Question 46 of 63

Study of Compounds — Nitric Acid — Question 46

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46
Question

Question 2(2014)

Give balanced equations for the following:

(i) Laboratory preparation of nitric acid.

(ii) Action of heat on a mixture of copper and concentrated nitric acid.

Answer

(i) Balanced equation for laboratory preparation of nitric acid:

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

(ii) Balanced equation for action of heat on a mixture of copper and concentrated nitric acid:

Cu+4HNO3[conc.]⟶Cu(NO3)2+2H2O+2NO2\text{Cu} + 4\underset{[conc.]}{\text{HNO}_3} \longrightarrow \text{Cu(NO}_3 \text{)}_2 + 2\text{H}_2 \text{O} + 2\text{NO}_2