Chemistry
Give two chemical equations for each of the following:
(a) Reactions of nitric acid with non-metals.
(b) Nitric acid showing as acidic character.
(c) Nitric acid acting as oxidising agent.
Nitric Acid
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Answer
(a) Action on non-metals:
C + 4HNO3 ⟶ CO2 + 2H2O + 4NO2
S + 6HNO3 ⟶ H2SO4 + 2H2O + 6NO2
(b) Reaction with alkalis:
K2O + 2HNO3 ⟶ 2KNO3 + H2O
CuO + 2HNO3 ⟶ Cu(NO3)2 + H2O
(c) Nitric acid acting as oxidising agent:
C + 4HNO3 ⟶ CO2 + 2H2O + 4NO2
3Cu + 8HNO3 [cold and dil.] ⟶ 3Cu(NO3)2 + 4H2O + 2NO
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Related Questions
(a) Nitric acid cannot be concentrated beyond 68% by the distillation of a dilute solution of HNO3. State the reason.
(b) What is passive iron? How is passivity removed?
Name the products formed when:
(a) carbon and conc. nitric acid is heated,
(b) dilute HNO3 is added to copper.
Write balanced equations and name the products formed when:
(a) Sodium hydrogen carbonate is added to nitric acid.
(b) Cupric oxide reacts with nitric acid
(c) Zinc reacts with dilute nitric acid
(d) Concentrated nitric acid is heated
How will you prepare the following from nitric acid?
(a) Sodium nitrate
(b) Copper nitrate
(c) Lead nitrate
(d) Magnesium nitrate
(e) Ferric nitrate
(f) Aqua regia