Question

Salts may be classified as soluble or insoluble. 

1. Select from the following list a pair of compounds that can be used to prepare a soluble and an insoluble salt.
   HNO₃, Pb(NO₃)₂, KNO₃, BaO, NaCl
   1. Soluble salt
   2. Insoluble salt 
2. Describe how a soluble salt is obtained from its solution 

Answer 1

1.  
   1. HNO₃ or BaO
   2. Pb(NO₃)₂ and NaCl
2. Heat/boil to evaporate the mixture to saturation
   Allow to cool
   Filter the residue.