Question

A white solid dissolve in water to form a colourless solution. The colourless solution forms a white precipitate with Ammonia solution but dissolve in excess alkali. The colourless solution forms a white precipitate with Lead (II) Nitrate solution. The white Precipitate dissolve on warming to form a colourless solution.

1. Write the chemical formulae for the ion formed when the colourless solution react with excess ammonia solution. 
2. Write the name of the ion present in the white solid. 

Answer 1

1. Write the chemical formulae for the ion formed when the colourless solution react with excess ammonia solution. 
   • [Zn(NH₃)₄]^2- 
2. Write the name of the ion present in the white solid. 
   • Chloride ion