Question

An aqueous solution of hydrogen chloride can be prepared as shown in the diagram below.
         

1. Give two reasons for using an inverted funnel. 
2. Few drops of Lead (II) nitrate solution were added to 4cm³ of the solution obtained above, followed by excess aqueous ammonia. Explain the observation made.  

Answer 1

1.  
   1. To prevent the suck back
   2. To increase the surface area over which the gas dissolves in water
2.  
   1. A white precipitate is formed
   2. Pb2⁺ ions react with Cl⁻ions to form the insoluble PbCl₂