Question

On heating blue coloured powder of copper (II) nitrate in a boiling tube, copper oxide (black), oxygen gas and a brown gas X is formed.
(a) Write a balanced chemical equation of the above reaction.
(b) Identity the brown gas X evolved.
(c) Identify the type of reaction.
(d) What could be the pH range of an aqueous solution of the gas X?

Answer 1

Answer:

Explanation:

(a) 2Cu(NO3

)2

(s) Heat 2CuO(s) + O2

(g)

+ 4NO2

(g)

(b) Brown gas X formed is nitrogen dioxide (NO2

).

(c) This is a decomposition reaction.

(d) NO2

gas dissolves in water to form an acidic

solution, because it is an oxide of a non-metal.

Therefore, the pH of this solution is less than 7.

Answer 2

Answer:

Refer to the attachment...