Study of Compounds — Nitric Acid — Question 14

(a) Sodium hydrogen carbonate when treated with nitric acid forms sodium nitrate, carbon dioxide and water.

NaHCO₃ + HNO₃ ⟶ NaNO₃ + H₂O + CO₂ ↑

(b) Cupric oxide reacts with dilute nitric acid, it forms copper nitrate and water.

CuO + 2HNO₃ ⟶ Cu(NO₃)₂ + H₂O

(c) Zinc reacts with dil. nitric acid to form zinc nitrate, nitric oxide and water

3Zn + 8HNO₃ ⟶ 3Zn(NO₃)₂ + 4H₂O + 2NO

(d) When concentrated nitric acid is heated it forms nitrogen dioxide gas, water and oxygen gas

4HNO₃ $\xrightarrow{\Delta}$ 4NO₂ + 2H₂O + O₂