Represent the following chemical changes in the form of chemical equations and balance them. (a) A copper coin is placed in a solution of corrosivesublimate, mercuric chloride. The products obtained are cupric chloride and mercury. (b) A piece of (a) sulphur, (b) charcoal burns vigorously whendropped in molten potassium nitrate, because potassium nitrate decomposesto form potassium nitrite and oxygen, and thisoxygen helps to burn charcoal andsulphur giving out carbon dioxide andsulphur dioxide, respectively. (c )Aqueous ammonium hydroxide solution is made to react with aqueous copper sulphate solution and a bluish white precipitate of cupric hydroxide, and ammonium sulphate are formed.

Represent the following chemical changes in the form of chemical equat

1.	Represent the following chemical changes in the form of chemical equations and balance them. (a) A copper coin is placed in a solution of corrosivesublimate, mercuric chloride. The products obtained are cupric chloride and mercury. (b) A piece of (a) sulphur, (b) charcoal burns vigorously whendropped in molten potassium nitrate, because potassium nitrate decomposesto form potassium nitrite and oxygen, and thisoxygen helps to burn charcoal andsulphur giving out carbon dioxide andsulphur dioxide, respectively. (c )Aqueous ammonium hydroxide solution is made to react with aqueous copper sulphate solution and a bluish white precipitate of cupric hydroxide, and ammonium sulphate are formed.
Answer» Solution :(a) The copper displaces the mercury from MERCURIC chloride andforms cupric chloride andmercury. `(Cu+HgCl_(2) to CuCl_(2) + Hg)` (B)` 2 KNO_(3) to 2 KNO_(2) + O_(2)` `S + O_(2) to SO_(2)` `C + O_(2) to CO_(2)` (c ) `2NH_(4)OH + CuSO_(4) to Cu(OH)_(2) + (NH_(4))_(2) SO_(4)`