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 ..1) write a balanced chemical equation ..2) identify the brown gas X ..3) type of reaction ..4) pH range of X l

Answer 1

The copper(II)nitrate decomposes when heated to form the following products:
 1)balanced chemical equation:               
                                       Heat
                  2Cu(NO3)2 -------> 2CuO +O2 +4NO2
                     (S)                            (S)      (G)      (G)
                                                           reddish-brown

2)Brown gas is:
         Nitrogen(II)oxide gas

3)Type of reaction:
     A decomposition reaction

4)pH range of gas X (NO2):

  This gas is acidic

Answer 2

1. Balanced Chemical Equation:

=  2Cu[NO3]2   ========   2CuO + O2 + 4NO2

2. Brown X gas:

= X is nitrogen dioxide gas[No2].

3. Type of Reaction:

= It is Decomposition Reaction.

4. PH level of X solution:

= The gas is acidic. So ph range of gas X is between 1 to 7.