The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid.

(a) Name A (a liquid), B (a solid) and C (a liquid). (Do not give the formulae).

(b) Write an equation to show how nitric acid undergoes decomposition.

(c) Write the equation for the reaction in which copper is oxidized by concentrated nitric acid.

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Solution

(a)
A = Conc. Sulphuric acid
B = Potassium nitrate
C = Nitric acid

(b) Nitric acid undergoes decomposition as
follows:

$4 H N O_{3} ⟶ 4 N O_{2} + 2 H_{2} O + O_{2}$

(c) Copper is oxidized by concentrated nitric acid:

$C u + 4 H N O_{3} ⟶ C u (N O_{3})_{2} + 2 H_{2} O + 2 N O_{2}$

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Similar questions

Q. The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid:

(i) Name A (a liquid), B (a solid) and C (a liquid).
(ii) Write the balanced chemical equation to show how nitric acid undergoes decomposition.
(iii) Write the balanced chemical equation for the reaction in which copper is oxidised by concentrated nitric acid.

Q. (a) When nitric acid is prepared by the action of concentrated sulphuric acid on potassium nitrate, what is the special feature of the apparatus used?
(b) Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.
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(b) In the preparation of nitric acid from

K N O_{3}

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(c) Conc. nitric acid prepared in laboratory is yellow in colour. Why? How is this colour removed? [4 MARKS]

Q. (i) Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated sulphuric acid and potassium nitrate.
(ii) Write a chemical equation to illustrate the acidic nature of nitric acid.

(a) (i) Explain, why only all glass apparatus should be used for the preparation of nitric acid by heating concentrated acid and potassium nitrate.
(ii) Write a chemical equation to illustrate the acidic nature of nitric acid.
(iii) Name the products formed when ammonium nitrate is heated.

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(a) A = Conc. Sulphuric acid B = Potassium nitrate C = Nitric acid (b) Nitric acid undergoes decomposition as follows: 4HNO3⟶4NO2+2H2O+O2 (c) Copper is oxidized by concentrated nitric acid: Cu+4HNO3⟶Cu(NO3)2+2H2O+2NO2

(a)
A = Conc. Sulphuric acid
B = Potassium nitrate
C = Nitric acid

(b) Nitric acid undergoes decomposition as
follows:

$4 H N O_{3} ⟶ 4 N O_{2} + 2 H_{2} O + O_{2}$

(c) Copper is oxidized by concentrated nitric acid:

$C u + 4 H N O_{3} ⟶ C u (N O_{3})_{2} + 2 H_{2} O + 2 N O_{2}$